Two new transformed sesquiterpenes of alantolactone by Mucor polymorphosporus were obtained. They were characterized as 3-hydroxy-11H-eudesm-5-en-8,12-olide (2) and 3,11-dihydroxy-eudesm-5-en-8,12-olide (3), on the basis of spectral methods including 2D NMR. And product 3 was an unusual hydroxylation derivative of alantolactone at C-11.Plant SciencesChemistry, AppliedChemistry, MedicinalPharmacology & PharmacySCI(E)PubMed7ARTICLE10933-9371