The Tetrazosin hydrochloride, with the CAS registry number 63074-08-8, has the IUPAC name of [4-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl](tetrahydrofuran-2-yl)methanone hydrochloride (1:1). It is a kind of white to off-white powder, and belongs to following the product categories: Pharmaceutical; (Intermediate of levofloxacin); Terazosin; Adrenoceptor. And the molecular formula of the chemical is C₁₉H₂₆ClN₅O₄.

The physical properties of Tetrazosin hydrochloride are as followings: (1)ACD/LogP: -0.96; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1.95; (4)ACD/LogD (pH 7.4): -1.01; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 6.42; (9)#H bond acceptors: 9; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 4; (12)Polar Surface Area: 80.26 Ų; (13)Flash Point: 355.7 °C; (14)Enthalpy of Vaporization: 97.72 kJ/mol; (15)Boiling Point: 664.5 °C at 760 mmHg; (16)Vapour Pressure: 1.59E-17 mmHg at 25°C.

You should be cautious while dealing with this chemical. It is harmful if swallowed, and it also irritates to eyes, respiratory system and skin. Therefore, you had better take the following instructions: Wear suitable protective clothing, and in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.    

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(N3CCN(c2nc1cc(OC)c(OC)cc1c(n2)N)CC3)C4OCCC4.Cl
(2)InChI: InChI=1/C19H25N5O4.ClH/c1-26-15-10-12-13(11-16(15)27-2)21-19(22-17(12)20)24-7-5-23(6-8-24)18(25)14-4-3-9-28-14;/h10-11,14H,3-9H2,1-2H3,(H2,20,21,22);1H
(3)InChIKey: IWSWDOUXSCRCKW-UHFFFAOYAA

The toxicity data is as follows: