Amino acid derivatives

Details Amino acid derivatives Amino acid derivatives

2006-04-28

2009-11-03

Witherspoon, Sikarl A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C560S024000, C548S495000

Reexamination Certificate

active

07612226

ABSTRACT:
The present invention relates to a method of treating pain using a compound of formulawherein R1, R2, R3and R4are as defined herein. The invention also relates to certain novel derivatives of formula (I).

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