Patent ID: 6949554

Claim:
A method to treat a condition selected from the group consisting of pain, stroke, epilepsy, anxiety and depression in a subject, which method comprises administering to a subject in need of such treatment an amount of a compound of formula (1) effective to treat said condition wherein said compound of formula (1) is: or a pharmaceutically acceptable salt thereof wherein each R 1 -R 5 is independently optionally substituted alkyl (1-10C), alkenyl (2-10C), alkynyl (2-10C), aryl (6-10C), alkylaryl (7-16C) or alkenylaryl (7-16C) each optionally further containing 1-4 heteroatoms (N, O or S) and wherein said optional substituents may include ═O; or each of R 1 -R 5 is independently halo, NO 2 , SO, SO 2 , SO 2 NH 2 , —OH, SH or NH 2 , and wherein R 3 may be keto if n 3 =1; and wherein two substituents on adjacent positions of the same ring may form a 3-7 membered saturated or unsaturated ring fused to said substituted ring, said fused ring itself optionally substituted and optionally containing one or more heteroatoms (N, S, O); or wherein a combination of R 1 and R 2 and/or R 4 and R 5 may form a bond or a bridge between phenyl groups A and B and/or C and D; and wherein each n 1 -n 2 and n 4 -n 5 is independently 0-4, and n 3 is 1-4; and/or the compound of formula (1) is in the form of an isolated stereoisomer; or the compound of formula (1) is P49 or P50 in FIG. ( 1 ) or a salt thereof.