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US 4,066,666 AGranted
15-Oxasteroids
AssigneeHoffmann-La Roche Inc.
InventorPerry Rosen
Life of this patent
Estimating the term…
Abstract
15-Oxasteroids of the androstane, pregnane, estrane, and 19-norpregnane series are useful as hormonal agents.
Claims3
A compound of the formula ##STR10## wherein R.sub.1 is lower alkyl of from 1 to 5 carbon atoms;
- W is ##STR11## wherein R is hydrogen, lower alkyl, cycloalkyl, lower alkanoyl or aroyl and Z is ketal protected carbonyl selected from the group consisting of ethylenedioxymethylene, 1,3-propylenedioxymethylene and 2,3-butylenedioxymethylene.
Dependencies are inferred from the claim text.