Of -yatein

Sakakibara N, Suzuki S, Umezawa T et al (2003) Biosynthesis of yatein in Anthriscus sylvestris. Org Biol Chem 1 2474-2485... 

This lactone derives from the shikimic acid-cinnamic acid pathway, via oxidative dimerization of coniferyl alcohol. Whereas the presence of yatein itself was not detected in the plants producing steganes, presteganes A and B were isolated in Steganotaenia araliaceae and constitute therefore viable biogenetic precursors [82,83]. 

As indicated above, the methylenedioxy bridge of yatein is formed wifh 4, 5 -dimefhylfhujaplicatin as a substrate. The methylenedioxy bridge of bursehemin is, however, direcfly infroduced at the level of matairesinol prior to the methylation of the 4 -OH group (Sakakibara et al, 2003). 

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