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Gartz J. 
“Extraction and Analysis of Indole Derivatives from Fungal Biomass”. 
J. Basic Microbiol.. 1994;34(1):17-22.
The occurrence and extraction of indole derivatives in six species from four genera of higher fungi were investigated . By using pure methanol for extraction of the mushrooms analysis revealed the -highest concentrations of psilocybin and baeocystin . The psilocin content of the species was higher by using aqueous solutions of alcohols than with methanol alone but was an artificial phenomenon caused by enzymatic destruction of psilocybin . The extraction with dilute acetic acid yielded better results than with the water containing alcohols, The simple one-step procedure with methanol for the quantitative extraction is still the safest method to obtain the genuine alkaloids from fungal biomass.
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