Absolute Konfiguration von β,ε‐Carotin‐2‐ol, β,β‐Carotin‐2‐ol und β,β‐Carotin‐2,2′‐diol

By chemical degradation and application of the modified Horeau method the xanthophylls of Trentepohlia iolithus , namely 1a , 2a and 3a , have been shown to possess the (2 R , 6′ R )‐, (2 R )‐, and (2 R , 2′ R )‐configurations respectively.