26833-85-2 Alkaloid C from Cephalotaxus Cephalotaxine, 4-methyl 2-hydroxy-2-(3-hydroxy-3-methylbutyl)butanedioate (ester) Cephalotaxine, 4-methyl 2-hydroxy-2-(3-hydroxy-3-methylbutyl)butanedioate (ester), [3(R)]- Cephalotaxine, 4-methyl-2-hydroxy-2-(3-hydroxy-3-methylbutyl)butanedioate (ester), [3(R)]- HARRINGTONINE Harringtonin NSC124147