Structural Formula Vector Image
Title: Altrenogest
CAS Registry Number: 850-52-2
CAS Name: (17b)-17-Hydroxy-17-(2-propenyl)estra-4,9,11-trien-3-one
Additional Names: 17a-allyl-17-hydroxyestra-4,9,11-trien-3-one; 13b-methyl-17a-allyl-D4,9,11-gonatriene-17b-ol-3-one; allytrenbolone
Manufacturers' Codes: A-35957; RU-2267
Trademarks: Regu-Mate (Intervet)
Molecular Formula: C21H26O2
Molecular Weight: 310.43
Percent Composition: C 81.25%, H 8.44%, O 10.31%
Literature References: Synthetic oral progestogen. Prepn: NL 6401555; G. Nomine et al., US 3257278 (1964, 1966 both to Roussel). Effect on estrous cycle and fertility of mares: E. L. Squires et al., J. Anim. Sci. 49, 729 (1979). Synchronization of estrus in swine: R. R. Kraeling et al., ibid. 52, 831 (1981); in gilts: V. G. Pursel et al., ibid. 130.
Properties: Cryst, mp 120°. [a]D20 -72° (c = 0.5 in ethanol).
Melting point: mp 120°
Optical Rotation: [a]D20 -72° (c = 0.5 in ethanol)
Therap-Cat-Vet: Progestogen.

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