label: a globoside GalGb4Cer + UDP-N-acetyl-alpha-D-glucosamine <=> a globoside GlcNAc-(beta1->6)-GalGb4Cer + UDP + H(+)
label_lc: a globoside galgb4cer + udp-n-acetyl-alpha-d-glucosamine <=> a globoside glcnac-(beta1->6)-galgb4cer + udp + h(+)