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Three novel bibenzyl derivatives, blestritins A–C (1–3), along with 18 known constituents, were isolated from the tubers of Bletilla striata (Orchidaceae), a traditional Chinese medicine used for the treatment of tuberculosis and haemorrhage of the stomach and lungs. Their structures were identified on the basis of spectroscopic analyses. [ABSTRACT FROM AUTHOR]

Mol­ecules of the title compound, C23H24N4O, are linked into chains by O—H⋯N hydrogen bonds and C—H⋯π inter­actions. Aromatic π–π stacking inter­actions exist between chains. [ABSTRACT FROM AUTHOR]

A new labdane diterpene, amentotaxin A (1), and an unprecedented dinorlabdane diterpene, amentotaxin B (2), were isolated from the stems of Amentotaxus argotaenia (Hance) Pilger, together with seven known compounds. Their structures were identified by in-depth spectroscopic and mass-spectrometric analyses. [ABSTRACT FROM AUTHOR]

The title compound, C21H25NO2, was synthesized by a Reformatsky-type reaction. In the molecule, the dihedral angle between the two phenyl rings is 66.1 (1)° and the crystal packing exhibits no classical hydrogen bonds. [ABSTRACT FROM AUTHOR]