SMILES: CC(=O)N[C@@H]1[C@H]([C@H]([C@H](O[C@@H]1OC[C@@H](C(=O)O)N)CO)O)O[C@H]2[C@@H]([C@H]([C@H]([C@H](O2)CO)O)O)O
Description: The molecule is a serine derivative that is L-serine having a 3-O-beta-D-galactosyl-N-acetyl-alpha-D-galactosaminyl moiety attached to the side-chain oxygen. It is an O-glycosyl-L-serine and a non-proteinogenic L-alpha-amino acid. It is a tautomer of an O-(3-O-beta-D-galactosyl-N-acetyl-alpha-D-galactosaminyl)-L-serine zwitterion.