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Norgestimate
C23H31NO3 369.51
 18,19-Dinor-17-pregn-4-en-20-yn-3-one, 17-(acetyloxy)-13-ethyl-, oxime, (17α)-(+)-;
 (+)-13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one oxime acetate (ester) [35189-28-7]

DEFINITION

Norgestimate is a mixture of (E)- and (Z)-isomers having a ratio of (E)- to (Z)-isomer between 1.27 and 1.78, and it contains NLT 98.0% and NMT 102.0% of norgestimate (C23H31NO3), calculated on the dried basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Norelgestromin RS
USP Norgestimate RS
USP Norgestimate Related Compound A RS
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