The crystal of racemic narlumicine, C21H21NO7, 6-[[6-[2-(dimethylamino) ethyl]-1,3-benzodioxol-5-yl]hydroxymethyl]furo[3,4-e]-1,3-benzodioxol-8(6H)-one, have been investigated by X-ray diffraction methods. The crystal are monoclinic, space group P2-1c,a=10,792(2), b=18.064(4), c=10.053(3)A, beta=104.77(3)degree, Z=4. The structure was solved by direct methods and refined to R=0.036 for 2149 observed reflections. The three-cycle and two-cycle moieties are nearly planar and the dihedral angle between them is 63.5 degree. The sum of bond angles around the nitrogen atom is 330.2 degree. The fourth apex of the pyramid is pccupated by O-H...N hydrogen bond. The intermolecular hydrogen bond O-H...N (2.716(5)A) links the molecules into chains parallel to the y axis.