Synonyms: PHOTOBARBATUSIN I;NSC270914;MLS003389317;Dehydrocyclobutatusin;AC1L83UP;NSC-270914;NCI60_002217;62288-03-3;Spiro(cyclobuta[def]phenanthrene-2(1H),5(4H)-dione, 3,7-bis(acetyloxy)-3,3a,3b,6,6a,7,8,8c-octahydro-3a,8-dihydroxy-2',6,6,8c-tetramethyl-