Abstract
A bis-epoxide ergostane triterpenoid (favolon), its undescribed derivative (favolon C), and a biogenetically related norergostane (laschiatrion) were isolated from the cultures of basidiomycete Favolaschia calocera BCC 36684. The stereochemistry of favolon was also determined for the first time. Additionally, we propose the revision of the C-24 configuration of laschiatrion to 24R.
