CA Patent

CA2135173A1 — Ester derivatives of 4-aza-steroids

Assigned to Merck and Co Inc · Expires 1993-11-25 · 32y expired

What this patent protects

Compounds of formula (I), wherein X is sulfur or oxygen are inhibitors of the 5.alpha.-reductase enzyme and isozymes thereof. The compounds are useful for the treatment of hyperandrogenic disease conditions and diseases of the skin and scalp.

USPTO Abstract

Compounds of formula (I), wherein X is sulfur or oxygen are inhibitors of the 5.alpha.-reductase enzyme and isozymes thereof. The compounds are useful for the treatment of hyperandrogenic disease conditions and diseases of the skin and scalp.

Drugs covered by this patent

Patent Metadata

Patent number
CA2135173A1
Jurisdiction
CA
Classification
—
Expires
1993-11-25
Drug substance claim
No
Drug product claim
No
Assignee
Merck and Co Inc
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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