Title: Pentagestrone
CAS Registry Number: 7001-56-1
CAS Name: 3-(Cyclopentyloxy)-17-hydroxypregna-3,5-dien-20-one
Additional Names: 17a-hydroxyprogesterone 3-cyclopentyl enol ether
Molecular Formula: C26H38O3
Molecular Weight: 398.58
Percent Composition: C 78.35%, H 9.61%, O 12.04%
Literature References: Prepn of acetate: Ercoli, Gardi, J. Am. Chem. Soc. 82, 746 (1960); of free alcohol and acetate: Ercoli, US 3019241 (1962).
Properties: Solid, mp 184.5-186.5°. [a]D -115° (dioxane).
Melting point: mp 184.5-186.5°
Optical Rotation: [a]D -115° (dioxane)
Derivative Type: Acetate
CAS Registry Number: 1178-60-5
Additional Names: 17a-Acetoxyprogesterone 3-cyclopentyl enol ether
Trademarks: Gestovis
Molecular Formula: C28H40O4
Molecular Weight: 440.61
Percent Composition: C 76.33%, H 9.15%, O 14.52%
Properties: Solid, mp 137-138°; also reported as 157-158°, Ercoli, GB 893315 (1962 to Vismara). [a]D -147° (dioxane).
Melting point: mp 137-138°
Optical Rotation: [a]D -147° (dioxane)
Therap-Cat: Progestogen.
Keywords: Progestogen.