Abstract
Metabolism of biosynthetic (−)- trans-(3R,4R)-dihydroxy-3,4-dihydrochrysene by liver microsomes from control, phenobarbital-treated and 3-methylcholanthrene-treated rats was investigated. Although previous studies of the metabolism of related benzo[a]pyrene and benzo[e]pyrene dihydrodiols which also prefer the diaxial conformation had indicated that diol epoxides were minor metabolites, the diastereomeric chrysene 3,4-diol-1,2-epoxides- 1 and −2 were major metabolites (66–90%). All three types of microsomes metabolized the chrysene 3,4-dihydrodiol at low but essentially similar rates (0.5–0.7 nmol substrate/nmol cytochrome P-450/min).
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