1,2-cyclopentanedicarboxylic acid, 4-methylene-, dimethyl ester, (1R,2R)- InChI=1/C10H14O4/c1-6-4-7(9(11)13-2)8(5-6)10(12)14-3/h7-8H,1,4-5H2,2-3H3/t7-,8-/m1/s dimethyl (1R,2R)-4-methylenecyclopentane-1,2-dicarboxylate