freeEnd--1?1D-GalNAc,p--??1D-Gal,p--??1D-GlcNAc,p--??1D-Gal,p(--??1D-GlcNAc,p--??1D-Gal,p--3?2D-NeuGc,p)--??1D-GlcNAc,p--??1D-Gal,p--3?2D-NeuGc,p$MONO,Und,0,0,freeEnd