The Piribedil, with the CAS registry number 3605-01-4, is also known as 1-(2-Pyrimidyl)-4-(3,4-methylenedioxybenzyl)piperazine. It belongs to the product category of API. Its EINECS number is 222-764-6. This chemical's molecular formula is C₁₆H₁₈N₄O₂ and molecular weight is 298.34. What's more, its systematic name is 2-[4-(1,3-Benzodioxol-5-ylmethyl)-1-piperazinyl]pyrimidine. Its classification codes are: (1)Anti-Dyskinesia Agents; (2)Antiparkinson agents; (3)Central Nervous System Agents; (4)Dopamine Agents; (5)Dopamine agonists; (6)Drug / Therapeutic Agent; (7)Neurotransmitter Agents. This chemical is a dopamine D2 agonist. It is used in the treatment of parkinson disease, particularly for alleviation of tremor. It has also been used for circulatory disorders and in other applications as a D2 agonist. It is also used as chemical reagents, fine chemicals, organic synthesis reagents and pharmaceutical intermediates. 

Physical properties of Piribedil are: (1)ACD/LogP: 2.433; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.79; (4)ACD/LogD (pH 7.4): 2.42; (5)ACD/BCF (pH 5.5): 9.50; (6)ACD/BCF (pH 7.4): 39.96; (7)ACD/KOC (pH 5.5): 114.56; (8)ACD/KOC (pH 7.4): 482.02; (9)#H bond acceptors: 6; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 50.72 Å²; (13)Index of Refraction: 1.632; (14)Molar Refractivity: 81.534 cm³; (15)Molar Volume: 228.69 cm³; (16)Polarizability: 32.323×10^-24cm³; (17)Surface Tension: 61.24 dyne/cm; (18)Density: 1.305 g/cm³; (19)Flash Point: 237.665 °C; (20)Enthalpy of Vaporization: 73.172 kJ/mol; (21)Boiling Point: 469.368 °C at 760 mmHg; (22)Vapour Pressure: 0 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: O1c2ccc(cc2OC1)CN4CCN(c3ncccn3)CC4
(2)Std. InChI: InChI=1S/C16H18N4O2/c1-4-17-16(18-5-1)20-8-6-19(7-9-20)11-13-2-3-14-15(10-13)22-12-21-14/h1-5,10H,6-9,11-12H2
(3)Std. InChIKey: OQDPVLVUJFGPGQ-UHFFFAOYSA-N

The toxicity data is as follows: