The microbialtransformation of (+)-isolongifolen-4-one (4) by a number of fungi by means of a standard two-stage fermentation technique afforded (7R)-12-hydroxyisolongifolen-4-one (5), (7S)-13-hydroxyisolongifolen-4-one (6), (11R)-11-hydroxyisolongifolen-4-one (7), (10R)-10-hydroxyisolongifolen-4-one (8), and (9R)-9-hydroxyisolongifolen-4-one (9) (Scheme). All five metabolites were found to be new