preferred_name: indoxyl + UDP-alpha-D-glucose => indican + UDP + H(+)
preferred_name_lc: indoxyl + udp-alpha-d-glucose => indican + udp + h(+)
label: indoxyl + UDP-alpha-D-glucose => indican + UDP + H(+)
label_lc: indoxyl + udp-alpha-d-glucose => indican + udp + h(+)