preferred_name: alpha-D-galactosyl-(1->4)-N-acetyl-beta-D-galactosaminyl-(1->3)-alpha-D-galactosyl-(1->4)-N-acetyl-beta-D-galactosaminyl-(1->3)-alpha-D-galactosyl-(1->4)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1')-N-acylsphingosine