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

摘要： 从长缘厚朴（Magnolia rostrata W.W. Smith）树皮中分离得到1个新化合物——联烯丙基苯对苯醌类物质，命名为木兰醌magnoquinone （1）,以及7个已知新木脂素类化合物，厚朴酚magnolol (2)，和厚朴酚honokiol (3)，4-o-methylhonokiol (4)，3-o-methylmagnolol （5）,magnoldehyde B （6）,magnolignan A （7）和magnolignan C （8）。研究表明，长缘厚朴可作为中药厚朴（Magnolia officinalis）的代用品。

关键词: 长缘厚朴, 木兰科, 木兰醌, 新木脂素类化合物