beta-D-GlcpNAc-(1->2)-alpha-D-Rhap-(1->2)-alpha-D-Rhap-(1->3)-alpha-D-Rhap-(1->3)-beta-D-GlcpNAc-(1->2)-alpha-D-Rhap-(1->2)-alpha-D-Rhap-(1->3)-?-D-Rhap(1->