label: 15-methylhexadecasphing-4-enine + a fatty acyl-CoA <=> an N-acyl-15-methylhexadecasphing-4-enine + CoA + H(+)
label_lc: 15-methylhexadecasphing-4-enine + a fatty acyl-coa <=> an n-acyl-15-methylhexadecasphing-4-enine + coa + h(+)