The C_9 unit empirical formula of MWL was: C_9H_(8.35)O_(3.61)(OCH_3)_(1.342), with 0.35 Ph-OH and 1.342 methoxyl group in each C_9 unit.

• 麦草磨木木素的C_9单元经验式为C_9H_(8.；35)O_(3