Revised structures of the two C50 carotenoids C.p. 450 and C.p. 473 from Corynebacterium poinsettiae
Abstract
The revised structures 2,2′-bis-(4-hydroxy-3-methylbut-2-enyl)-β,β-carotene and 2-(4-hydroxy-3-methylbut-2-enyl)-2′-(3-methylbut-2-enyl)-3′,4′-didehydro-l′,2′-dihydro-β,ψ-caroten-1′-ol for the two C50 carotenoids C.p. 450 and C.p. 473 from Corynebacterium poinsettiae were deduced by 1H and 13C n.m.r. spectroscopy.