1H-pyrrole-2-carboxylic acid, 4-(chlorosulfonyl)-1,5-dimethyl-, ethyl ester InChI=1/C8H10ClNO4S/c1-3-14-8(11)6-4-7(5(2)10-6)15(9,12)13/h4,10H,3H2,1-2H ethyl 4-(chlorosulfonyl)-1,5-dimethyl-1H-pyrrole-2-carboxylate