Toluene-4-sulfonic acid 2-tertiary-butoxy ethyl ester

2-(5,5-dimethylcyclohex-3-en-1-yl)ethanol,4-methylbenzenesulfonic acid

3-(4-methylphenyl)sulfonyl-3-azabicyclo[2.2.1]hept-5-en-2-one

(5-oxocyclohex-3-en-1-yl)methyl 4-methylbenzenesulfonate

(r)-2-甲苯磺酰氧基丙酸甲酯