Trogopterins A-C: Three new neolignans from feces of Trogopterus xanthipes.

Seven compounds, including three neolignans 1-3, a norlignan 4, and three diterpenoids 5-7, were isolated from the feces of Trogopterus xanthipes. Structures of these compounds were identified by 1D and 2D NMR as well as MS. The absolute configurations of compounds 1, 2, and 4 were determined by comparing CD spectra and optical rotations.