磺达肝癸钠 114870-03-0 Fondaparinux 　　N-4 　　N-3 114903-05-8 Methyl O-2-azido-2-deoxy-3,4-bis-O-(phenylmethyl)-alpha-D-glucopyranosyl-(1→4)-O-2,3-bis-O-(phenylmethyl)-beta-D-glucopyranuronosyl-(1→4)-O-2-azido-2-deoxy-alpha-D-glucopyranosyl-(1→4)-O-3-O-(phenylmethyl)-alpha-L-idopyranuronosyl-(1→4)-2-deoxy-2-[[(phenylmethoxy)carbonyl]amino]-3-O-(phenylmethyl)-alpha-D-glucopyranoside