20076-79-3 2H-Thiopyran-5-carboxylic acid, 3-benzyl-4-hydroxy-6-methyl-2-oxo-, ethyl ester 3-Benzyl-4-hydroxy-5-carbaethoxy-6-methyl-thia-alpha-pyron [German] 3-Benzyl-4-hydroxy-6-methyl-2-oxo-2H-thiopyran-5-carboxylic acid ethyl ester SV 1