The accelerating effect of the carboxyl group on epimerization of C-17, C-21 and C-22 asymmetric sites of petroleum hopane acids

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[1] Vanyukova, N.A.

[2] Frolov, E.B.

[3] Parenago, O.P.

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Vanyukova, N.A. | 1991年 / 31期

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