The molecule is an epoxide. It has a role as an intercalator. It derives from a hydride of a benzo[a]pyrene.
4-oxahexacyclo[11.6.2.02,8.03,5.010,20.017,21]henicosa-1(20),2(8),9,11,13(21),14,16,18-octaene-6,7-diol