Carbamic acid, [2-amino-6-[[(4-fluorophenyl)methyl]amino]-3-pyridinyl]-, ethyl ester, (Z)-2-butenedioate (1:1) (ZCI); Efiret; Flupirtine maleate,ethyl (2-amino-6-((4-fluorobenzyl)amino)pyridin-3-yl)carbamate maleate,Analgesic. Substituted pyridine with central analgesic properties.,Flupirtine API