英文别名
3β-hydroxy-lupen-(20(29))-oic acid-(28)-ethyl ester;3β-Hydroxy-lupen-(20(29))-saeure-(28)-aethylester;3β-3-hydroxylup-20(29)-en-28-oic acid ethyl ester;betulinic acid ethyl ester;ethyl (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-prop-1-en-2-yl-1,2,3,4,5,6,7,7a,9,10,11,11b,12,13,13a,13b-hexadecahydrocyclopenta[a]chrysene-3a-carboxylate