Metabolites of 2-aminophenol from fruit bodies of Lepiota americana (Agaricales).

From the acetone extract of the North American toadstool Lepiota americana 2-aminophenoxazin-3-one (1) and a novel amino-1,4-benzoquinone derivative, lepiotaquinone (2), were isolated. The structure of 2 was confirmed by its preparation from 2-aminophenol and amino-1,4-benzoquinone.

Melanocrocin, a polyene pigment from Melanogaster broomeianus (Basidiomycetes).

A new polyene pigment, melanocrocin, has been isolated either from fruit bodies or mycelial cultures of the subterranean fungus Melanogaster broomeianus. The structure of the pigment was determined by spectroscopic methods and chemical transformations. Melanocrocin is the N-acyl derivative of L-phenylalanine methyl ester with a polyolefinic carboxylic acid.