(4S,6R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-4-methyl-2,2-dioxo-2λ6-[1,2,3]oxathiazinane-3,6-dicarboxylic acid 3-tert-butyl ester 6-ethyl ester

(4S,6R)-6-(hydroxymethyl)-6-methyl-3,4,5,6-tetrahydropyrimidine-4-carboxylic acid

(+)-(4S,6S)-6-hydroxymethyl-6-methyl-1,4,5,6-tetrahydropyrimidine-4-carboxylic acid

(4S,6S)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-6-methyl-5,6-dihydro-4H-pyrimidine-1,4-dicarboxylic acid 1-tert-butyl ester 4-ethyl ester

(4S,6R)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-6-methyl-5,6-dihydro-4H-pyrimidine-1,4-dicarboxylic acid 1-tert-butyl ester 4-ethyl ester