1-(((alpha-isobutanoyloxyethoxy)carbonyl)aminomethyl)-1-cyclohexaneacetic acid [ XP 10569,XP 11084,XP 11239,XP 12464,XP 13512,XP-10569,XP-11084,XP-11239,XP-12464,XP-13512,XP10569,XP11084,XP11239,XP12464,XP13512,gabapentin enacarbil ] XP-13512 is the (+-)-isomer; a gabapentin prodrug; structure in first source