(-)-Anantine 2-Pyrrolidinone, 4-(1-methyl-1H-imidazol-4-yl)-3-(phenylmethylene)-, (3E,4S)- 2-Pyrrolidinone, 4-(1-methyl-1H-imidazol-4-yl)-3-(phenylmethylene)-, (S-(E))- 39368-46-2 50656-82-1 Anantine Cynometra ananta alkaloid C