1-Chloro-1a,9b-dihydro-1H-phenanthro(9,10-b)azirine 1H-Phenanthro(9,10-b)azirine, 1a,9b-dihydro-1-chloro- 81593-15-9 BRN 4680919 CCRIS 2133 N-Chlorophenanthrene 9,10-imine N-Chlorophenanthreneimine