4-methoxy-2,5-dimethylbenzenesulfonyl chloride InChI=1/C9H11ClO3S/c1-6-5-9(14(10,11)12)7(2)4-8(6)13-3/h4-5H,1-3H benzenesulfonyl chloride, 4-methoxy-2,5-dimethyl-