methyl 1,1-dioxo-3-phenylthiazetidine-2-carboxylate

2-methoxy-6-phenyl-5,6-dihydro-1,4,3-oxathiazine 4,4-dioxide

1-(2-methoxy-4,4-dioxo-5,6-dihydro-1,4,3-oxathiazin-6-yl)pyrrolidine-2,5-dione

2-methoxy-5,6,6-trimethyl-5H-1,4,3-oxathiazine 4,4-dioxide

3,3,4-trimethyl-1,1-dioxo-1λ6-[1,2]thiazetidine-2-carboxylic acid methyl ester