(1aR-cis)-1a,2,3,11c-Tetrahydrobenzo(6,7)phenanthro(3,4-b)oxirene 1a,2,3,11c-Tetrahydrobenzo(6,7)phenanthro(3,4-b)oxirene (1aR-cis)- 89618-15-5 Benzo(6,7)phenanthro(3,4-b)oxirene, 1a,2,3,11c-tetrahydro-, (1aR-cis)-