2,4,6-trimethylbenzenesulfonyl chloride 2-mesitylenesulfonyl chloride 773-64-8 InChI=1/C9H11ClO2S/c1-6-4-7(2)9(8(3)5-6)13(10,11)12/h4-5H,1-3H benzenesulfonyl chloride, 2,4,6-trimethyl-