label: ganglioside GM1 (d18:1(4E)/18:0) + CMP-N-acetyl-beta-neuraminate => ganglioside GD1a (18:1(4E)/18:0) + CMP + H(+)
label_lc: ganglioside gm1 (d18:1(4e)/18:0) + cmp-n-acetyl-beta-neuraminate => ganglioside gd1a (18:1(4e)/18:0) + cmp + h(+)