Deli, J. (1994) “Nigroxanthin (3’,4’-Didehydro-β,γ-carotene-3,6’-diol), a New Carotenoid Isolated from Paprika (Capsicum annuum var. longum nigrum)”, CHIMIA, 48(4), p. 102. doi:10.2533/chimia.1994.102.