Natural products Mycena haematopus

several unique chemicals produced mycena haematopus. primary pigment haematopodin b, chemically sensitive (breaking down upon exposure air , light) more stable breakdown product, haematopodin, known before eventual discovery , characterization in 2008. chemical synthesis haematopodin reported in 1996. haematopodins first pyrroloquinoline alkaloids discovered in fungi; pyrroloquinolines combine structures of pyrrole , quinoline, both heterocyclic aromatic organic compounds. compounds of type occur in marine sponges , attracting research interest due various biological properties, such cytotoxicity against tumor cell lines, , both antifungal , antimicrobial activities. additional alkaloid compounds in m. haematopus include red pigments mycenarubins d, e , f. prior discovery of these compounds, pyrroloquinoline alkaloids considered rare in terrestrial sources.