preferred_name: L-homoserine + acetyl-CoA => O-acetyl-L-homoserine + CoA
preferred_name_lc: l-homoserine + acetyl-coa => o-acetyl-l-homoserine + coa
label: L-homoserine + acetyl-CoA => O-acetyl-L-homoserine + CoA
label_lc: l-homoserine + acetyl-coa => o-acetyl-l-homoserine + coa