The Eupatilin, with CAS registry number 22368-21-4, has the systematic name of 2-(3,4-dimethoxyphenyl)-5,7-dihydroxy-6-methoxy-4H-chromen-4-one. And its IUPAC name is the same one. Besides, it is also called 4H-1-benzopyran-4-one, 2-(3,4-dimethoxyphenyl)-5,7-dihydroxy-6-methoxy-. In addition, the formula is C₁₈H₁₆O₇ and the molecular weight is 344.31.

Physical properties about this chemical are: (1)ACD/LogP: 2.46; (2)# of Rule of 5 Violations: 0; (3)#H bond acceptors: 7; (4)#H bond donors: 2; (5)#Freely Rotating Bonds: 6; (6)Polar Surface Area: 72.45 Å²; (7)Index of Refraction: 1.627; (8)Molar Refractivity: 88 cm³; (9)Molar Volume: 248.1 cm³; (10)Polarizability: 34.88×10^-24cm³; (11)Surface Tension: 57 dyne/cm; (12)Enthalpy of Vaporization: 90.46 kJ/mol; (13)Vapour Pressure: 3.21E-14 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
(1)SMILES: O=C\1c3c(O)c(OC)c(O)cc3O/C(=C/1)c2ccc(OC)c(OC)c2
(2)InChI: InChI=1/C18H16O7/c1-22-12-5-4-9(6-14(12)23-2)13-7-10(19)16-15(25-13)8-11(20)18(24-3)17(16)21/h4-8,20-21H,1-3H3
(3)InChIKey: DRRWBCNQOKKKOL-UHFFFAOYAP
(4)Std. InChI: InChI=1S/C18H16O7/c1-22-12-5-4-9(6-14(12)23-2)13-7-10(19)16-15(25-13)8-11(20)18(24-3)17(16)21/h4-8,20-21H,1-3H3
(5)Std. InChIKey: DRRWBCNQOKKKOL-UHFFFAOYSA-N