Abstract

A comparison was made between 4-substituted pyrazoles and short-chain alcohols as inducers of cytochrome P-450. A quantitative structure-activity analysis of the data led to the following equations: (I) Pyrazoles: Log 1/C = 0.85 (±0.21) Log P + 1.93 (±0.38), r = 0.970 (II) Alcohols: Log l/C = 0.78 (±0.14) Log P + 1.46 (±0.13), r = 0.988 where C is the concentration that caused a 50% increase in cytochrome P-450, P is the partition coefficient between octanol and water, and r is the correlation coefficient. The results suggest that induction of cytochrome P-450 by these compounds depends on hydrophobicity alone. Electronic and steric factors have insignificant roles.

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