The 9H-Xanthene,9-(9H-xanthen-9-ylidene)- with CAS registry number of 517-45-3 is also called Dixanthylidene. The IUPAC name is 9-(9H-xanthen-9-ylidene)-9H-xanthene. Its EINECS registry number is 208-241-5. In addition, the formula is C₂₆H₁₆O₂ and the molecular weight is 360.4.

Physical properties about this chemical are: (1)ACD/LogP: 8.49; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 8.49; (4)ACD/LogD (pH 7.4): 8.49; (5)ACD/BCF (pH 5.5): 1000000; (6)ACD/BCF (pH 7.4): 1000000; (7)ACD/KOC (pH 5.5): 986294.56; (8)ACD/KOC (pH 7.4): 986294.56; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 18.46 Å²; (13)Index of Refraction: 1.711; (14)Molar Refractivity: 108.44 cm³; (15)Molar Volume: 277.1 cm³; (16)Polarizability: 42.98 ×10^-24cm³; (17)Surface Tension: 56.5 dyne/cm; (18)Density: 1.3 g/cm³; (19)Flash Point: 188.4 °C; (20)Enthalpy of Vaporization: 73.26 kJ/mol; (21)Boiling Point: 494.2 °C at 760 mmHg; (22)Vapour Pressure: 2E-09 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: O5c1ccccc1/C(=C2/c4c(Oc3c2cccc3)cccc4)c6ccccc56
(2)InChI: InChI=1/C26H16O2/c1-5-13-21-17(9-1)25(18-10-2-6-14-22(18)27-21)26-19-11-3-7-15-23(19)28-24-16-8-4-12-20(24)26/h1-16H
(3)InChIKey: SXXWAWNPJCEOGD-UHFFFAOYAR