Vitamin D derivatives

Details Vitamin D derivatives Vitamin D derivatives

2011-07-26

2011-07-26

Qazi, Sabiha (Department: 1628)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

9,10-seco- cyclopentanohydrophenanthrene ring system doai

C552S653000

Reexamination Certificate

active

07985744

ABSTRACT:
The object of the present invention is to provide vitamin D derivatives that have excellent physiological activities as medicines, particularly as therapeutic agents for skin diseases such as psoriasis, and that have a reduced hypercalcemic effect.The present invention provides a vitamin D derivative of Formula (1):whereinX represents an oxygen atom or a sulfur atom;m represents a number of 1 to 3;R1and R2each represent a hydrogen atom or an alkyl group;R4and R5each represent a hydrogen atom or a hydroxyl group, etc.;R3represents —YR8, etc.;R6represents a hydrogen atom, etc.;R7represents a hydrogen atom, etc.

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