label: a ganglioside GalNAc-GD1a (d18:1(4E)) + UDP + H(+) => a ganglioside GD1a (d18:1(4E)) + UDP-N-acetyl-alpha-D-galactosamine
label_lc: a ganglioside galnac-gd1a (d18:1(4e)) + udp + h(+) => a ganglioside gd1a (d18:1(4e)) + udp-n-acetyl-alpha-d-galactosamine