2H-1,3,5-thiadiazine-3(4H)-hexanoic acid, 5-(2-carboxyethyl)dihydro-2-thioxo- 6-[5-(2-Carboxy-ethyl)-2-thioxo-[1,3,5]thiadiazinan-3-yl]-hexanoic acid 6-[5-(2-carboxyethyl)-2-thioxo-1,3,5-thiadiazinan-3-yl]hexanoic acid InChI=1/C12H20N2O4S2/c15-10(16)4-2-1-3-6-14-8-13(7-5-11(17)18)9-20-12(14)19/h1-9H2,(H,15,16)(H,17,18