1':2'-Dihydro-4'-methyl-3:4-benzpyrene 3-05-00-02488 (Beilstein Handbook Reference) 7499-32-3 9,10-Dihydro-7-methylbenzo(a)pyrene BENZO(a)PYRENE, 9,10-DIHYDRO-7-METHYL- BRN 3304066 NSC 407643