00700001_00725000/704171 76931-93-6 Ethanethioic acid, S-(2-((2,5-dioxo-1-pyrrolidinyl)oxy)-2-oxoethyl) ester HSATA N-Hydroxysuccinimide S-acetylthioacetate N-Succinimidyl-S-acetylthioacetate S-Acetylthioacetic acid N-hydroxysuccinimide ester SATA