This chemical is called 4-Chloro-5-methylthieno[2,3-d]pyrimidine, and it can also be named as Buttpark 46\18-75. With the CAS number of 43088-67-1, its molecular formula is C₇H₅ClN₂S. Moreover, the 4-Chloro-5-methylthieno[2,3-d]pyrimidine is belong to organic intermediates or fine chemicals, and it's often used on drug research and development.

Physical properties about this chemical are: (1)ACD/LogP: 2.25; (2)# of Rule of 5 Violations: 0; (3)#H bond acceptors: 2; (4)#H bond donors: 0; (5)#Freely Rotating Bonds: 0; (6)Polar Surface Area: 54.02Ų; (7)Index of Refraction: 1.682; (8)Molar Refractivity: 48.38 cm³; (9)Molar Volume: 127.7 cm³; (10)Polarizability: 19.18×10^-24 cm³; (11)Surface Tension: 60.4 dyne/cm; (12)Density: 1.445 g/cm³; (13)Flash Point: 136 °C; (14)Enthalpy of Vaporization: 51.98 kJ/mol; (15)Boiling Point: 301.3 °C at 760 mmHg; (16)Vapour Pressure: 0.0019 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
(1)SMILES: Clc2ncnc1scc(c12)C
(2)InChI: InChI=1/C7H5ClN2S/c1-4-2-11-7-5(4)6(8)9-3-10-7/h2-3H,1H3
(3)InChIKey: UAIXPCWTEUFSNI-UHFFFAOYAM
(4)Std. InChI: InChI=1S/C7H5ClN2S/c1-4-2-11-7-5(4)6(8)9-3-10-7/h2-3H,1H3
(4)Std. InChIKey: UAIXPCWTEUFSNI-UHFFFAOYSA-N