Structure and configuration of tavimolidin
From the roots ofPeucedanum mogoltavicum Korov. have been isolated tadzhiferin, farnesiferol B, 5-methoxy-3,4-methylenedioxypropiophenone, and a new terpenoid coumarin — tavimolidin. The structure and absolute configuration of tavimolidin have been established on the basis of a study of its chemical and spectral characteristics. The passage from tavimolidin to feselol has confirmed the structure proposed previously for mogoltavinin, mogoltavin, and mogoltin and has established their absolute configurations.
A new coumarin from Ferula loscosii and the correct structure of coladonin
Abstract From the roots of Ferula loscosii the coumarins umbelliprenin, coladin and coladonin and the new natural isovaleryl derivative of the latter have been isolated. A study which confirms the structure of coladonin and its difference from farnesiferol A is also given.
Correlation of diterpenes of the (–)-kaurane series and atractyligenin
19-Nor-16α- and 19-nor-16β-(-)-kaurane (11) and (111) have been prepared by unambiguous methods from 16α-( -)-kaurane-3α,l7,19-triol (IV) and (-)-kaur-16-ene-3α,l9-diol (V) and have been identified with samples derived from atractyligenin, thus providing conclusive proof for the skeleton of the latter.