Patent · US Expired

1,3-Dibenzoic acid esters of 17.alpha.-ethynyl-7.alpha.-methyl-1,3,5(10)-estratriene-1,3,17.beta.-tri ol

US4259325A · kind A · utility

11Cited by

4References

12Claims

0Family size

Assignee

Schering A.G. · DE

Inventors

Klaus Prezewowsky
Hermann Steinbeck · Berlin, DE
Rudolf Wiechert · Berlin, DE

Key dates

Filing date	Apr 10, 1979
Grant date	Mar 31, 1981
Priority date	—
Expiry date	Apr 10, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07J1/0096
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

1,3-Dibenzoic acid esters of 17.alpha.-ethynyl-7.alpha.-methyl-1,3,5(10)-estratriene-1,3,17.beta.-triol possess strong estrogenic and ovulation-inhibiting activities. As compared to the corresponding diacetic acid ester, these dibenzoic acid esters remain stable over 2-7 months even in the desired, low dosage at a thermal load of up to 60.degree. C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.