Dihydroxydihydrobenzopyrenes. Dihydrodiols, Benzopyrene . Diols, Dihydrobenzopyrene . Benzopyrene Dihydrodiols . Dihydrobenzopyrene Diols . Dihydrodiolbenzopyrenes . Benzopyrenes saturated in any two adjacent positions and substituted with two hydroxyl groups in any position. The majority of these compounds have carcinogenic or mutagenic activity. . 0.78