152509-92-7 3,27-Di-O-p-coumaroyloxyolean-12-en-28-oic acid Asprellic acid A Asprellic acid B Asprellic acid C Olean-12-en-28-oic acid, 3,27-bis((3-(4-hydroxyphenyl)-1-oxo-2-propenyl)oxy)-, (3beta(E),27(E))-