preferred_name: a carotenoid psi-end group = a carotenoid beta-end derivative
preferred_name_lc: a carotenoid psi-end group = a carotenoid beta-end derivative
label: a carotenoid psi-end group = a carotenoid beta-end derivative
label_lc: a carotenoid psi-end group = a carotenoid beta-end derivative