A Series of New Apocarotenoids from the Black Bass

Abstract

A series of new apocarotenoids, micropteroxanthins, has been isolated from the integuments of the black bass Micropterus salmoides, namely α-micropteroxanthin A, α-micropteroxanthin B, β-micropteroxanthin, and 7, 8-didehydro-β-micropteroxanthin. These structures have been de-termined to be (3S, 6S)-11', 12'-dihydro-10'-apo-ε-carotene-3, 10'-diol, (3R, 6S)-11', 12'-dihydro-10'-apo-ε-carotene-3, 10'-diol, (3R)-11', 12'-dihydro-10'-apo-β-carotene-3, 10'-diol, and 3(R)-7, 8-didehydro-11', 12'-dihydro-10'-apo-β-carotene-3, 10'-diol, respectively.
The possible metabolic pathways of carotenoids to new apocarotenoids, micropteroxanthins, by an eccentric cleavage in the black bass have been proposed.