3863-56-7 Udp-Ga1NAc-S Udp-N-acetylgalactosamine 4-sulfate Uridine 5'-(trihydrogen diphosphate), P'-(2-(acetylamino)-2-deoxy-4-O-sulfo-alpha-D-galactopyranosyl) ester Uridine diphosphate-N-acetylgalactosamine 4-sulfate