This invention relates to novel esters of benzopyrans represented by the formulae ##SPC1## Wherein R and R' are hydrogen or C.sub.1 -C.sub.6 alkyl and when alkyl are on the same or different carbons; R.sub.1 is C.sub.1 -C.sub.6 alkyl; R.sub.2 is C.sub.1 -C.sub.20 alkyl, lowercycloalkyloweralkyl or lowercycloalkyl; n is an integer from 3 to 7, and particularly 3 to 5; Y is a straight or branched chain C.sub.1 -C.sub.8 alkylene; and R.sub.3 is ##EQU1## WHEREIN A IS AN INTEGER FROM 1 TO 4, B IS AN INTEGER FROM 1 TO 4, X is O,S, CH.sub.2 or NR.sub.4 and R.sub.4 is hydrogen C.sub.1 -C.sub.6 alkyl, and R.sub.5 is hydrogen or C.sub.1 -C.sub.6 alkyl; and the acid addition salts thereof. The compounds exhibit analgesic and central nervous system activity.
previously reported the synthesis, in vitro and in silico activities of new GABAanalogues as inhibitors of the GABA-AT enzyme from Pseudomonas fluorescens, where the nitrogen atom at the γ-position is embedded in heterocyclic scaffolds. With the goal of finding more potent inhibitors, we now report the synthesis of a new set of GABAanalogues with a broader variation of heterocyclic scaffolds at the