Chenopodolans A-C: Phytotoxic furopyrans produced by Phoma chenopodiicola, a fungal pathogen of Chenopodium album

Chenopodolan A (1), the two close analogues chenopodolan B (2) and C (3), phytotoxic new furopyrans, with potential herbicidal activity, were isolated together with (−)-(R)-6-hydroxymellein from the culture filtrates of Phoma chenopodiicola.