143896-40-6 Galnac-O-ser-ser-gly Glycine, N-(N-(O-(2-(acetylamino)-2-deoxy-alpha-D-galactopyranosyl)-L-seryl)-L-seryl)- N-(N-(O-(2-(Acetylamino)-2-deoxy-alpha-D-galactopyranosyl)-L-seryl)-L-seryl)glycine N-Acetylgalactosamine-O-seryl-seryl-glycine Supprescin A