(1aR-cis)-1a,10,11,11a-Tetrahydrobenzo(6,7)phenanthro(1,2-b)oxirene 1a,10,11,11a-Tetrahydrobenzo(6,7)phenanthro(1,2-b)oxirene (1aR-cis)- 89618-17-7 Benzo(6,7)phenanthro(1,2-b)oxirene, 1a,10,11,11a-tetrahydro-, (1aR-cis)-