Structure of Methylpheophorbide-rci*
نویسنده
چکیده
The methanolic extract of the cyanobacterium (blue-green alga) Spirulina geitleri has been treated with methanolic acid to convert all chlorophyllous pigments to their methylpheophorbides. Fractionation of the latter from methylpheophorbide a by thin layer chromatography and high pressure liquid chromatography yielded methylpheophorbide-RCI. Its structure has been determined as 13’shydroxy-20-chloro-methylpheophorbide a by ‘H-nuclear magnetic resonance, absorption and circular dichroism spectroscopy, mass spectrometry and by partial synthesis from chlorophyll a . The pigment is isolated from Spirulina geitleri irrespective of the use or omission of chlorinated substances during the isolation procedure.
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