IUPAC:(6R,9R,10S)-9-[(3,4-dimethoxy-2,5-dioxocyclopent-3-en-1-ylidene)(methoxy)methyl]-2,3,8-trimethoxy-6,10-diphenylspiro[4.5]deca-2,7-diene-1,4-dione
IUPAC:(6R,9R,10S)-9-[(3,4-dimethoxy-2,5-dioxocyclopent-3-en-1-ylidene)(methoxy)methyl]-2,3,8-trimethoxy-6,10-diphenylspiro[4.5]deca-2,7-diene-1,4-dione