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Chemical Constituents of Two Liverworts Metacalypogeia Alternifolia and Chandonanthus Hirtellus
Author(s) -
Shy HorngShing,
Wu ChiaLi,
Paul Claudia,
König Wilfried A.,
Ean UniJuni
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200091
Subject(s) - chemistry , chloroform , genus , stereochemistry , derivative (finance) , chemical constituents , botany , organic chemistry , chromatography , financial economics , economics , biology
A novel linear dihydrodichromene derivative, metacalypogin, was identified from the Taiwanese liverwort Metacalypogeia alternifolia . Together with data from M. cordifolia , the chemical marker of the genus Metacalypogeia is obvious chroman derivatives, which is far different from that of Calypogeia , the other genus in the same family. In addition, two isomeric diterpenoids of cembrane‐type were identified from the Chinese liverwort Chandonanthus hirtellus . The relative stereostructures of the latter two isomers were proved by X‐ray crystallography. Both compounds were unstable in chloroform solution and further oxidized to the corresponding peroxy hemiacetal derivatives.