The 4H-1-Benzopyran-4-one, 3, 5, 7, 8-tetrahydroxy-2-(4-hydroxyphenyl)-, with the CAS registry number 527-95-7, is also known as Herbacetin. It belongs to the product categories of Penta-substituted Flavones. This chemical's molecular formula is C₁₅H₁₀O₇ and molecular weight is 302.237. What's more, its IUPAC name is 3, 5, 7, 8-Tetrahydroxy-2-(4-hydroxyphenyl)chromen-4-one.

Physical properties about 4H-1-Benzopyran-4-one, 3, 5, 7, 8-tetrahydroxy-2-(4-hydroxyphenyl)- are: (1)ACD/LogP: 1.14; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 1.09; (4)ACD/LogD (pH 7.4): 0.06; (5)ACD/BCF (pH 5.5): 3.88; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 89.22; (8)ACD/KOC (pH 7.4): 8.19; (9)#H bond acceptors: 7; (10)#H bond donors: 5; (11)#Freely Rotating Bonds: 6; (12)Polar Surface Area: 72.45 Å²; (13)Index of Refraction: 1.823; (14)Molar Refractivity: 73.31 cm³; (15)Molar Volume: 167.9 cm³; (16)Polarizability: 29.06×10^-24 cm³; (17)Surface Tension: 114.8 dyne/cm; (18)Density: 1.799 g/cm³; (19)Flash Point: 239 °C; (20)Enthalpy of Vaporization: 95.09 kJ/mol; (21)Boiling Point: 618.7 °C at 760 mmHg; (22)Vapour Pressure: 6.68E-16 mmHg at 25 °C.

Preparation of 4H-1-Benzopyran-4-one, 3, 5, 7, 8-tetrahydroxy-2-(4-hydroxyphenyl)-: this chemical is prepared by Herbacetin-3-β-D-(2-O-β-D-glucopyranosidoglucopyranosid)-8-β-D-glucopyranosid. The reaction needs reagent 1 % HCl and solvent Ethanol. The reaction time is 1 hour with reaction temperature of 70 °C. The yield is about 50 %.

You can still convert the following datas into molecular structure:
(1) SMILES: O=C1c3c(O/C(=C1/O)c2ccc(O)cc2)c(O)c(O)cc3O
(2) InChI: InChI=1/C15H10O7/c16-7-3-1-6(2-4-7)14-13(21)12(20)10-8(17)5-9(18)11(19)15(10)22-14/h1-5,16-19,21H
(3) InChIKey: ZDOTZEDNGNPOEW-UHFFFAOYAP