Assessment of the chemical composition and in vitro antimicrobial potential of extracts of the liverwort Scapania aspera.

The chemical composition of Scapania aspera extracts was determined by solid phase micro extraction gas chromatography-mass spectrometry (SPME GC-MS) and 96 constituents were identified. The dominant compounds in the methanol extract were beta-barbatene (25.1%), o-cymene (14.