Az. Mercadante et al., ISOLATION AND IDENTIFICATION OF NEW APOCAROTENOIDS FROM ANNATTO (BIXA-ORELLANA) SEEDS, Journal of agricultural and food chemistry, 45(4), 1997, pp. 1050-1054
Five apocarotenoids were isolated in trace amounts from the seed coat
of the Bixa orellana L. fruits. Their structures were established by m
eans of UV-visible, 400 and 500 MHz H-1 and 100 and 120 MHz C-13 NMR s
pectroscopy, and mass spectrometry, Methyl (7Z,9Z,9'Z)-apo-6'-lycopeno
ate, methyl (9Z)-apo-8'-lycopenoate, methyl (all-E)-apo-8'-lycopenoate
are new carotenoids, and the other two, methyl (all-E)-8'-apo-beta-ca
roten-8'-oate and methyl (all-E)-apo-6'-lycopenoate, have not been pre
viously found in annatto.