19-NORPREGNADIENODIONA 17-A SUBSTITUTED, 11-B-REPLACED-4-ARILO AND 21-REPLACED AS NEW ANTIPROGESTATIONAL AGENTS.

摘要

A compound having the general formula (See formula) in which: R 1 is -N (CH 3) 2; R 4 is methyl; X is = O; and R 2 and R 3 are both -OCH3, or R 3 is acetoxy and R 2 is a member selected from the group consisting of -OCH = CH2 and -OC (O) R 6 where R 6 is -CH2OCH3.