Abstract: A new compound, named magnoquinone(1), was isolated from the bark of Magnolia rostrata, together with seven known neolignans, magnolol ( 2 ) , honokiol( 3 ) , 4-o-methylhonokiol ( 4 ), 3-o-methylmagnolol（5）, magnaldehyde B（6）, magnolignan A（7）and magnolignan C（8）. Their structures were elucidated on the basis of spectral data. This research offered chemical components supports that Magnolia rostratacan can be as a substitute for M. officinalis, a traditional Chinaese medicine.

Key words: Magnolia rostrata