R. Frode et al., ISOLATION AND SYNTHESIS OF 3,4-BIS(INDOL-3-YL)PYRROLE-2,5-DICARBOXYLIC ACID-DERIVATIVES FROM THE SLIME-MOLD LYCOGALA-EPIDENDRUM, Tetrahedron letters, 35(11), 1994, pp. 1689-1690
Fruit bodies of the myxomycete Lycogala epidendrum contain the title c
ompounds 1a-c and 2, staurosporinone (3) and traces of bisindolylmalei
mides. Lycogalic acid A dimethyl ester (1a) has been synthesized from
methyl 3-(indol-3-yl)pyruvate in a one-pot reaction.