A further phytochemical investigation of the rhizomes of Acorus gramineus afforded three new quinone derivatives (1-3), together with two known compounds (4 and 5). The identification and structural elucidation of these new compounds were based on 1D and 2D NMR (COSY, HMQC, HMBC and NOESY) and MS data. The absolute configurations were established on the basis of their circular dichroism (CD) da...
