label: N-octadecanoylsphing-4-enine + D-galactose => beta-D-galactosyl-(1<->1')-N-octadecanoylsphing-4-enine + H2O
label_lc: n-octadecanoylsphing-4-enine + d-galactose => beta-d-galactosyl-(1<->1')-n-octadecanoylsphing-4-enine + h2o