(Received in the USA 10 October 1969; received in the m 25 foti publication 25 October
1969) Biosynthetic pathways leading to the furanocoumarins, in contrast with those to simple …

Labelling experiments with 14C and 3H have shown that linear furanocoumarins of Ammi
majus, Angelica archangelica, Heracleum lanatum (Umbelliferae), and Ruta graveolens …

The incorporations of o-coumaric acid-1-14 C, p-coumaric acid-1-14 C umbelliferone-3-T,
umbelliferone-3-T-7-glucoside, scopoletin-CH 3-T and 6-hydroxy-7-methoxycoumarin-CH 3 …

The biosynthesis of angular furanocoumarins from umbelliferone in Angelica archangelica
and Heracleum lanatum has been shown by isotope studies to parallel that of linear …

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Feeding experiments with various labeled forms of mevalonic acid were carried out with
Thamnosma montana tissue cultures. Three furanocoumarins, isopimpinellin (2) …

Evidence was found for the existence in Lavandula officinalis Chaix of 2-glucosyloxy-4-
methoxy-cis-cinnamic acid 1, which yields 7-methoxy showed that D-glucose, L …

Marmesin has been identified by chromatography and ultraviolet absorption spectrum in
extracts of Ruta graveolens, in confirmation of earlier conclusions from tracer experiments …

Investigations on the biosynthesis of the coumarins, umbelliprenin (1), isopimpinellin (2),
alloimperatorin methyl ether (3) and isoimperatorin (4) are described. Extensive degradation …

Coumarins are classi_ed by their 1H! 0! benzopyran! 1! one core structure" 0# and are
distinguished from other benzopyranones such as the isocoumarins" 1# 0 essentially for …