104942-80-5 6,9-Epoxy-2,4,3-benzodioxasilepin-7,8-dicarboxylic acid,1,5,6,9-tetrahydro-3,3-bis(2,4,6-trimethylphenyl)-, dimethyl ester 499970-84-2 6,9-Epoxy-2H,6H-pyrimido[2,1-b][1,3]oxazocin-2-one,7,8,9,10-tetrahydro-3-methyl-8-[(methylsulfonyl)oxy]-, (6R,8R,9R)-