Huperzine B CAS NO.:103548-82-9 Spec.:98% Huperzine B Alias 12-Methyl-2,3,4,4a,5,6-hexahydro-1H-5,10b-prop[1]eno-1,7-phenanthrolin-8(7H)-one; (4aR,5S,10bR)-12-methyl-2,3,4,4a,5,6-hexahydro-1H-5,10b-prop[1]eno-1,7-phenanthrolin-8(7H)-one CAS NO. 103548-82-9 Spec. 98% Appearance White powder Molecular formula C16H20N2O Molecular weight 256.3428 Huperzine B