Synonyms: 18-Norajmalan-19-al, 17-(acetyloxy)-1,2-didehydro-1-demethyl-21-methyl-, (17R,20alpha,21beta)-;Raucaffrine;18-Norajmalan-19-al,17-(acetyloxy)-1,2- didehydro-1-demethyl-21-methyl-,(17R,20R,- 21a)-;18-Norajmalan-19-al, 17-(acetyloxy)-1,2-didehydro-1-demethyl-21-methyl-, (17R,20a,21b)-;Indole alkaloid;