7, 8, 10, 11, 13, 14-Hexahydro-5H, 16H-dibenzo(l, p)(1, 4, 7, 10, 14, 15)tetraoxadithiacyclooctadecine-5, 16-dione

7, 8, 12-Trimethylbenz(a)anthracene

7, 8, 15, 16, 17, 18-Hexahydrodibenzo(e, m)(1, 4, 8, 11)tetraazacyclotetradecine

7, 8, 15, 16, 17-Pentathiadispiro(5.2.5.3)heptadecane

7, 8, 15, 16-Tetraoxadispiro(5.2.5.2)hexadecane

7, 8, 15, 16-Tetrathiadispiro(5.2.5.2)hexadecane

7, 8, 8-Trimethyl-4, 7-methano-1H-indazole

7, 8, 8-Trimethyl-4, 7-methano-2H-indazole

7, 8, 9, 10-Tetrahydro benzo(a)pyrene-7, 8, 9-triol, (7alpha, 8beta, 9beta)-

7, 8, 9, 10-Tetrahydro-1-nitro-benzo(a)pyren-10-ol

7, 8, 9, 10-Tetrahydro-3-nitro-benzo(a)pyren-10-ol

7, 8, 9, 10-Tetrahydro-6-nitro-benzo(a)pyren-10-ol

7, 8, 9, 10-Tetrahydro-7, 10-(epoxymethano)benzo(pqr)tetraphen-13-one

7, 8, 9, 10-Tetrahydro-7, 8, 10-trihydroxybenzo(a)pyrene-9-sulfonic acid

7, 8, 9, 10-Tetrahydro-7-semicarbazone-benzo(c)phenanthridine

7, 8, 9, 10-Tetrahydroazepino(2, 1-b)quinazolin-12(6H)-one

7, 8, 9, 10-Tetrahydrobenzo(a)pyrene

7, 8, 9, 10-Tetrahydroxytetrahydrobenzo(a)pyrene

7, 8, 9-Trimethoxy-4, 5-dihydronaphtho(2, 1-d)isoxazole

7, 8, 9-Trioxabicyclo(4.2.1)nonane