22-((3-Methyl-1-oxo-2-butenyl)oxy)-3-oxo-olean-12-en-28-oic acid, (22,beta)- 3-10-00-04397 (Beilstein Handbook Reference) 467-82-3 BRN 3078144 HSDB 3504 LANTADENE A Lantadene B Olean-12-en-28-oic acid, 22-((3-methyl-1-oxo-2-butenyl)oxy)-3-oxo-, (22beta)- Olean-12-en-28-oic acid, 22-beta-hydroxy-3-oxo-, 3-methylcrotonate