The crystal structure of the new title compound 2-ethoxy-3-n-butyl- benzofuro[2,3d]pyrimidin-4（3H）-one （C16H18N2O3, Mr = 286.32） has been prepared and determined by singlecrystal X-ray diffraction. The crystal is of monoclinic, space group P21/c with a = 13.7167（14）, b = 13.113（1）, c = 8.378（1） A, β = 98.992（2）^o, V = 1488.4（3） A^3, Z = 4, Dc = 1.278, F（000） = 608, μ = 0.089 mm^-1, MoKa radiation （2 = 0.71073）, R = 0.0498, wR = 0.1238 for 2336 observed reflections with I 〉 2σ（I）. X-ray diffraction analysis reveals that all ring atoms in the benzo[4, 5]furo [2,3-d] pyrimi- dinone moieties are almost coplanar.
＜正＞Green mould,caused by Penicillium digitatum,is the most essential post-harvest disease of citrus fruits.Ste...
Qing Y.Zhang~+ Li Zhao~q De l.Liu(?) Jian Wan~(*,+) ~+Key Laboratory of Pesticide and Chemical Biology(CCNU),Ministry of Education,College of Chemistry,Central ~qChina Normal University,Wuhan 430079,People''s Republic of China ~qCollege of Life Sciences,Central China Normal University,Wuhan 430071,China
