methyl 2-[[5-(1-methoxy-1-oxopropan-2-yl)sulfanyl-1,3,4-thiadiazol-2-yl]sulfanyl]propanoate methyl 2-[[5-(2-methoxy-1-methyl-2-oxo-ethyl)sulfanyl-1,3,4-thiadiazol-2-yl]sulfanyl]propanoate 2-[[5-[(2-methoxy-1-methyl-2-oxoethyl)thio]-1,3,4-thiadiazol-2-yl]thio]propanoic acid methyl ester 2-[[5-[(2-keto-2-methoxy-1-methyl-ethyl)thio]-1,3,4-thiadiazol-2-yl]thio]propionic acid methyl ester methyl 2-[[5-(1-methoxy-1-oxo-propan-2-yl)sulfanyl-1,3,4-thiadiazol-2-yl]sulfanyl]propanoate STOCK1S-45280 MLS000038494 SMR000037804