label: a beta-D-Gal-(1<->1')-ceramide + CMP-N-acetyl-beta-neuraminate <=> N-acetyl-alpha-neuraminosyl-(2->3)-beta-D-galactosyl-(1<->1')-ceramide + CMP + H(+)
label_lc: a beta-d-gal-(1<->1')-ceramide + cmp-n-acetyl-beta-neuraminate <=> n-acetyl-alpha-neuraminosyl-(2->3)-beta-d-galactosyl-(1<->1')-ceramide + cmp + h(+)