preferred_name: 7-carboxy-7-deazaguanine + NH4(+) => 6-carboxy-5,6,7,8-tetrahydropterin + H(+)
preferred_name_lc: 7-carboxy-7-deazaguanine + nh4(+) => 6-carboxy-5,6,7,8-tetrahydropterin + h(+)
label: 7-carboxy-7-deazaguanine + NH4(+) => 6-carboxy-5,6,7,8-tetrahydropterin + H(+)
label_lc: 7-carboxy-7-deazaguanine + nh4(+) => 6-carboxy-5,6,7,8-tetrahydropterin + h(+)