127486-99-1 3-Bstbtd 3-tert-Butyldiphenylsiloxy-2,3,3a,7a-tetrahydrobenzo(b)thiophen-5(4H)-one 1,1-dioxide Benzo(b)thiophen-5(4H)-one, 3-(((1,1-dimethylethyl)diphenylsilyl)oxy)-2,3,3a,7a-tetrahydro-, 1,1-dioxide, (3alpha,3abeta,7abeta)-(+-)-