pristimerin

Celastrol-methylether

3-Hydroxy-2-oxo-24-nor-D:A-friedoolean-1(10),3,5,7-tetren-29-oic acid methyl ester

(9β,13α,14β,20α)-3-Hydroxy-9,13-dimethyl-2-oxo-24,25,26-trinoroleana-1(10),3,5,7-tetraen-29-oicacidmethylester

(9b,13a,14b,20a)-3-Hydroxy-9,13-dimethyl-2-oxo-24,25,26-trinoroleana-1(10),3,5,7-tertraen-29-oic acid methyl ester