9-benzoyloxy-3,3,8-trimethyl-1,5-dihydro-[1,3]dioxepino[5,6-c]pyridine
6-[(triphenylphosphonio)methyl]-9-acetoxy-3,3,8-trimethyl-1,5-dihydro[1,3]dioxepino[5,6-c]pyridine chloride
8-[(triphenylphosphonio)methyl]-5,6-bis(hydroxymethyl)-2,2-dimethyl-4H-[1,3]dioxino[4,5-c]pyridine chloride