1,3-cyclopentanedicarboxylic acid, dimethyl ester, (1R,3S)- InChI=1/C9H14O4/c1-12-8(10)6-3-4-7(5-6)9(11)13-2/h6-7H,3-5H2,1-2H3/t6-,7 dimethyl (1R,3S)-cyclopentane-1,3-dicarboxylate