their dissociation constants ( kis and/or kii ) were 2-methyl histamine ( kis = 1751 mumol/l , s.e . = 163 ) less than 4-methyl histamine ( kis = 3551 mumol/l , s.e . = 414 ) less than dimaprit ( kis = 2931 mumol/l , s.e . = 605 ; kii = 3668 mumol/l , s.e . = 901 ) less than histamine ( kis = 6480 mumol/l , s.e . = 1360 ) .
C0025779
methyl histamine
C0019588
histamine