?-D-GlcpNAc3,4,6S3-(1->?)-?-D-GlcpA2,3S2-(1->?)-?-D-GlcpNAc3,6S2-(1->?)-?-D-GlcpA2,3S2-(1->?)-?-D-GlcpNAc3,6S2(1->