Page 515 - Applied Pharmacognosy
P. 515
Carotenoids 514
The carotenoids arise through a tail to tail condensation
of two geranyl-geranyl PP units. The product of this
condensation, phytoene, a C-40 precursor of all highly
coloured carotenoids, functions as vitamin A precursor
in many animals.
phytoene
