the term “ alcohol ,” as used herein , means a compound having formula r 1 oh , wherein r 1 is c 1 - alkyl , c 2 - alkyl , c 3 - alkyl , c 4 - alkyl , c 5 - alkyl or c 6 - alkyl . the term “ c 3 - alkyl ,” as used herein , means prop - 1 - yl and prop - 2 - yl ( isopropyl ). the term “ c 4 - alkyl ,” as used herein , means but - 1 - yl , but - 2 - yl , 2 - methylprop - 1 - yl and 2 - methylprop - 2 - yl ( tert - butyl ). the term “ c 5 - alkyl ,” as used herein , means 2 , 2 - dimethylprop - 1 - y1 ( neo - pentyl ), 2 - methylbut - 1 - yl , 2 - methylbut - 2 - yl , 3 - methylbut - 1 - yl , 3 - methylbut - 2 - yl , pent - 1 - yl , pent - 2 - yl and pent - 3 - yl . the term “ c 6 - alkyl ,” as used herein , means 2 , 2 - dimethylbut - 1 - yl , 2 , 3 - dimethylbut - 1 - yl , 2 , 3 - dimethylbut - 2 - yl , 3 , 3 - dimethylbut - 1 - yl , 3 , 3 - dimethylbut - 2 - yl , 2 - ethylbut - 1 - yl , hex - 1 - yl , hex - 2 - yl , 2 - methylpent - 1 - yl , 2 - methylpent - 2 - yl , 2 - methylpent - 3 - yl , 3 - methylpent - 1 - yl , 3 - methylpent - 2 - yl , 3 - methylpent - 3 - yl , 4 - methylpent - 1 - y1 and 4 - methylpent - 2 - yl . the term “ crystalline ,” as used herein , means having a regularly repeating arrangement of molecules or external face planes . the term “ substantial crystalline purity ,” as used herein , means at least about 95 % crystalline purity , preferably about 97 % crystalline purity , more preferably about 99 % crystalline purity , and most preferably about 100 % crystalline purity . the term “ crystalline purity ,” as used herein , means percentage of a crystalline compound in a sample which may contain an amorphous form of the same compound , at least one other crystalline form of the compound or a mixture thereof . the term “ substantial chemical purity ,” as used herein , means about 95 % chemical purity , preferably about 97 % chemical purity , more preferably about 98 % chemical purity , and most preferably about 100 % chemical purity . the term “ chemical purity ,” as used herein , means percentage of a particular compound in a sample . unless stated otherwise , percentages stated throughout this specification are weight / weight ( w / w ) percentages . the term “ amorphous ,” as used herein , means essentially without regularly repeating arrangement of molecules or external face planes . the term “ mixture ,” as used herein , means a combination of at least two substances , in which one substance may be completely soluble , partially soluble or essentially insoluble in the other substance . the term “ solvent ,” as used herein , means a substance , preferably a liquid or a miscible , partially miscible or immiscible mixture of two or more liquids , which is capable of completely dissolving , partially dissolving , dispersing or partially dispersing another substance , preferably a solid or a mixture of solids . the term “ anti - solvent ,” as used herein , means a solvent in which a compound is essentially insoluble . it is meant to be understood that , because many solvents and anti - solvents contain impurities , the level of impurities in solvents and anti - solvents for the practice of this invention , if present , are at a low enough concentration that they do not interfere with the intended use of the solvent in which they are present . it is meant to be understood that peak heights in a powder x - ray diffraction pattern may vary and will be dependent on variables such as the temperature , crystal size , crystal habit , sample preparation or sample height in the analysis well of the scintag × 2 diffraction pattern system . it is also meant to be understood that peak positions may vary when measured with different radiation sources . for example , cu — kα 1 , mo — kα , co — kα and fe — kα radiation , having wavelengths of 1 . 54060 å , 0 . 7107 å , 1 . 7902 å and 1 . 9373 å , respectively , may provide peak positions which differ from those measured with cu — kα radiation . while digital outputs from powder x - ray diffractometers may be set to express peak positions to the one - hundredth and one - thousandth of a degree past the decimal , diffractometers are incapable of accurate experimental determination beyond one - tenth of a degree . accordingly , peak positions reported herein are rounded to one - tenth of a degree past the decimal . compositions made with or comprising a crystalline compound of this invention may be administered , for example , bucally , ophthalmically , orally , osmotically , parenterally ( intramuscularly , intrasternally , intravenously , subcutaneously ), rectally , topically , transdermally or vaginally . ophthalmically administered dosage forms may be administered as , for example , elixirs , emulsions , microemulsions , oinments , solutions , suspensions or syrups . orally administered solid dosage forms may be administered as , for example , capsules , dragees , emulsions , granules , pills , powders , solutions , suspensions , tablets , microemulsions , elixirs , syrups or powders for reconstitution . osmotically and topically administered dosage forms may be administered as , for example , creams , gels , inhalants , lotions , ointments , pastes or powders . parenterally administered dosage forms may be administered , as , for example , aqueous or oleaginous suspensions . rectally and vaginally dosage forms may be administered , for example , as creams , gels , lotions , ointments or pastes . the therapeutically acceptable amount of a crystalline compound of this invention depends on recipient of treatment , disorder being treated and severity thereof , composition containing it , time of administration , route of administration , duration of treatment , its potency , its rate of clearance and whether or not another drug is co - administered . the amount of a crystalline compound of this invention used to make a composition to be administered daily to a patient in a single dose or in divided doses is from about 0 . 03 to about 200 mg / kg body weight . single dose compositions contain these amounts or a combination of submultiples thereof . a crystalline compound of this invention may be administered with or without an excipient . excipients include , for example , encapsulating materials or additives such as absorption accelerators , antioxidants , binders , buffers , coating agents , coloring agents , diluents , disintegrating agents , emulsifiers , extenders , fillers , flavoring agents , humectants , lubricants , perfumes , preservatives , propellants , releasing agents , sterilizing agents , sweeteners , solubilizers , wetting agents and mixtures thereof . excipients for preparation of compositions made with or comprising a crystalline compound of this invention to be administered orally in solid dosage form include , for example , agar , alginic acid , aluminum hydroxide , benzyl alcohol , benzyl benzoate , 1 , 3 - butylene glycol , carbomers , castor oil , cellulose , cellulose acetate , cocoa butter , corn starch , corn oil , cottonseed oil , cross - povidone , diglycerides , ethanol , ethyl cellulose , ethyl laureate , ethyl oleate , fatty acid esters , gelatin , germ oil , glucose , glycerol , groundnut oil , hydroxypropylmethyl celluose , isopropanol , isotonic saline , lactose , magnesium hydroxide , magnesium stearate , malt , mannitol , monoglycerides , olive oil , peanut oil , potassium phosphate salts , potato starch , povidone , propylene glycol , ringer &# 39 ; s solution , safflower oil , sesame oil , sodium carboxymethyl cellulose , sodium phosphate salts , sodium lauryl sulfate , sodium sorbitol , soybean oil , stearic acids , stearyl fumarate , sucrose , surfactants , talc , tragacanth , tetrahydrofurfuryl alcohol , triglycerides , water , and mixtures thereof . excipients for preparation of compositions made with a crystalline compound of this invention to be administered ophthalmically or orally in liquid dosage forms include , for example , 1 , 3 - butylene glycol , castor oil , corn oil , cottonseed oil , ethanol , fatty acid esters of sorbitan , germ oil , groundnut oil , glycerol , isopropanol , olive oil , polyethylene glycols , propylene glycol , sesame oil , water and mixtures thereof . excipients for preparation of compositions made with a crystalline compound of this invention to be administered osmotically include , for example , chlorofluorohydrocarbons , ethanol , water and mixtures thereof . excipients for preparation of compositions made with a crystalline compound of this invention to be administered parenterally include , for example , 1 , 3 - butanediol , castor oil , corn oil , cottonseed oil , dextrose , germ oil , groundnut oil , liposomes , oleic acid , olive oil , peanut oil , ringer &# 39 ; s solution , safflower oil , sesame oil , soybean oil , u . s . p . or isotonic sodium chloride solution , water and mixtures thereof . excipients for preparation of compositions made with or comprising a crystalline compound of this invention to be administered rectally or vaginally include , for example , cocoa butter , polyethylene glycol , wax and mixtures thereof . solubilities of 1 -( 6 - amino - 3 , 5 - difluoropyridin - 2 - yl )- 8 - chloro - 6 - fluoro - 1 , 4 - dihydro - 7 -( 3 - hydroxyazetidin - 1 - yl )- 4 - oxo - 3 - quinolinecarboxylic acid in different buffered solutions at 25 ° c . are shown in table 1 . the following examples are presented to provide what is believed to be the most useful and readily understood description of procedures and conceptual aspects of this invention . a mixture of 1 -( 6 - amino - 3 , 5 - difluoro2 - pyridinyl )- 8 - chloro - 6 - fluoro - 1 , 4 - dihydro - 7 -( 3 - hydroxyazetidin - 1 - yl )- 4 - oxo - 3 - quinolinecarboxylate ( 50 kg ) and 1 - deoxy - 1 -( methylamino )- d - glucitol ( 26 . 1 kg ) was diluted with water ( 75 . 5 kg ) and isopropanol ( 60 . 2 kg ), stirred at 45 ° c ., cooled to 30 ± 5 ° c ., treated with isopropanol ( 175 . 7 kg ) while maintaining the internal temperature at about 30 ° c . and filtered . the filtrant was washed with isopropanol and dried under reduced pressure at 30 ° c . for 12 hours then at 50 ° c . mp : 170 - 172 ° c . 1 h ( d 2 o / 500 mhz ) 8 . 22 ( d , j = 0 . 76 hz , 1h ), 7 . 71 ( d , j = 14 . 19 hz , 1h ), 7 . 52 ( dd , j = 9 . 31 , 0 . 77 hz , 1h ), 4 . 58 ( m , 2h ), 4 . 53 ( m , 1h ), 4 . 15 ( m , 3h ), 3 . 83 ( m , 2h ), 3 . 774 ( m , 1h ), 3 . 662 ( m , 2h ), 3 . 2 ( m , 2h ), 2 . 79 ( s , 3h ). a mixture of 1 -( 6 - amino - 3 , 5 - difluoro2 - pyridinyl )- 8 - chloro - 6 - fluoro - 1 , 4 - dihydro - 7 -( 3 - hydroxyazetidin - 1 - yl )- 4 - oxo - 3 - quinolinecarboxylate ( 29 . 6 kg ) and 1 - deoxy - 1 -( methylamino )- d - glucitol ( 18 . 4 kg ) was diluted with water ( 133 kg ), stirred at 60 ° c . until all solids dissolved , cooled to 38 ° c . and held there until solid formed , cooled to 0 ° c . and filtered . the filtrant was washed with isopropanol and dried at 50 ° c . the foregoing is merely illustrative of the invention and is not intended to limit the same to disclosed embodiments . variations and changes obvious to one skilled in the art are intended to be within the scope and nature of the invention as defined in the appended claims .