2-acyl-6-(alpha-D-mannosyl-(1->2)-alpha-D-mannosyl-(1->6)-alpha-D-mannosyl-(1->4)-alpha-D-glucosaminyl)-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1D-myo-inositol zwitterion
2-acyl-6-(alpha-d-mannosyl-(1->2)-alpha-d-mannosyl-(1->6)-alpha-d-mannosyl-(1->4)-alpha-d-glucosaminyl)-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1d-myo-inositol zwitterion
A glycosyl-phosphatidylinositol where R1 can be an alkyl or an acyl group, R2 and R3 are both acyl groups of undefined composition.