The biotransformation of bergapten (1) by the fungus Glomerella cingulata gave the corresponding reduced acid, 6, 7-furano-5-methoxy hydrocoumaric acid (2), a new compound. Xanthotoxin (3) was also converted to the corresponding reduced acid cnidiol b (4) and demethylated metabolite xanthotoxol (5) by G. cingulata. The structure of the new compound 2 was elucidated by high-resolution mass spectrometry, extensive NMR ...
![3-(6-hydroxy-7-methoxycyclopenta[c]pyran-1-yl)propanoic acid Structure](https://image.chemsrc.com/caspic/050/102826-90-4.png)