( Chitosan ( ( ( ( ( contains ( ( ( ( an ( amine group ) ) , ) or ) ( a group ) ) ) ( without ( ( ( ( carbons bonded ) ( to oxygen ) ) , ) ( whereas ( chitin ( contains ( an ( amide group ) ) ) ) ) ) ) ) , ) ( where ( this ( is ( the case ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Chitosan)) (VP (VBZ contains) (NP (NP (DT an) (JJ amine) (NN group)) (, ,) (CC or) (NP (DT a) (NN group))) (PP (IN without) (NP (NP (NNS carbons)) (VBN bonded) (PP (TO to) (NP (NN oxygen))) (, ,) (SBAR (IN whereas) (S (NP (NN chitin)) (VP (VBZ contains) (NP (DT an) (JJ amide) (NN group))))))) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (DT this)) (VP (VBZ is) (NP (DT the) (NN case)))))) (. .)))
Chitosan contains an amine group, or a group without carbons bonded to oxygen, whereas chitin contains an amide group, where this is the case.
(ROOT (S (NP (DT The) (NN term) (NNS amines)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NP (NNS molecules)) (SBAR (WHNP (WDT that)) (S (VP (VBP contain) (NP (JJ carbon-nitrogen) (NNS bonds))))))))))) (. .)))