| Benzenesulfonic acid, 4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis-, tetrasodium salt |
| Benzenesulfonothioic acid, 4-[bis(2-chloroethyl)amino]-, S-[4-[bis(2-chloroethyl)amino]phenyl] ester |
| Benzo[b]cyclobuta[d]thiophene-2,2a-dicarboxylic acid, 2a, 7b-dihydro-1-(1-pyrrolyl)-, dimethyl ester |