(8-methyl-4a,8,9,9a-tetrahydro-4H-[1,3]dioxino[5,4-d][1,3]dioxepin-9-yl) 4-methylbenzenesulfonate

[7-methyl-5,6-bis-(4-methylphenyl)sulfonyloxy-1,3-dioxepan-4-yl]methyl 4-methylbenzenesulfonate