乙酸酐

11,18-Diacetoxyhepta<2.2.2>starphen-5,6:12,17-dichinon

5,12-Diacetoxy-17,18-dihydroxyhepta<2.2.2>starphen-6,11-chinon

5,12,17,18-Tetraacetoxyhepta<2.2.2>starphen-6,11-chinon

12,17-Diacetoxyhepta(2.2.2)starphen-5,18:6,11-dichinon