preferred_name: putrescine + spermidine => sym-homospermidine + propane-1,3-diamine
preferred_name_lc: putrescine + spermidine => sym-homospermidine + propane-1,3-diamine
label: putrescine + spermidine => sym-homospermidine + propane-1,3-diamine
label_lc: putrescine + spermidine => sym-homospermidine + propane-1,3-diamine