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Atrasentan Hydrochloride (CAS 195733-43-8) is the orally available hydrochloride salt of a pyrrolidine-3-carboxylic acid derivative, featuring a complex chiral pyrrolidine ring system with three stereocenters at the 2R, 3R, and 4S positions. The molecular structure comprises a 4-(1,3-benzodioxol-5-yl) substituent at the 4-position, a 2-(dibutylamino)-2-oxoethyl group at the 1-position, and a 4-methoxyphenyl group at the 2-position of the pyrrolidine core, with a carboxylic acid functionality at the 3-position.

(S)-(-)-Verapamilic Acid Phenethylamine Salt (CAS 194854-18-7) is the 1:1 salt formed between (S)-(-)-Verapamilic Acid and (αR)-α-methylbenzenemethanamine ((R)-α-methylbenzylamine). This salt form is a key crystalline intermediate in the resolution process for producing enantiopure verapamilic acid.

Pipoxolan Hydrochloride (CAS 18174-58-8), also known as Pipisoxole Hydrochloride, is an anti-spasmodic agent that relieves smooth muscle spasms in the digestive, urinary, and gynecological systems. Chemically, Pipoxolan Hydrochloride is designated as 5,5-diphenyl-2-[2-(1-piperidinyl)ethyl]-1,3-dioxolan-4-one hydrochloride.

Minoxidil (CAS 38304-91-5) is a potent, direct-acting peripheral vasodilator that reduces peripheral resistance and produces a fall in blood pressure. Chemically, Minoxidil is designated as 6-(1-piperidinyl)-2,4-pyrimidinediamine 3-oxide. The molecule features a pyrimidine ring substituted with two amino groups at the 2- and 4-positions, a piperidine ring at the 6-position, and an N-oxide at the 3-position.

Roxatidine Acetate Hydrochloride (CAS 93793-83-0) is a specific and competitive histamine H₂-receptor antagonist. Chemically, Roxatidine Acetate Hydrochloride is designated as 2-acetoxy-N-[3-[3-(1-piperidinylmethyl)phenoxy]propyl]acetamide hydrochloride. The molecule features a central phenoxypropylamine scaffold with a piperidinylmethyl substituent at the meta position of the phenyl ring and an acetoxyacetamide side chain.

Nebivolol Hydrochloride (CAS 152520-56-4) is a third-generation, highly selective β₁-adrenergic receptor antagonist (β-blocker) that uniquely combines cardioselective β₁-receptor blockade with nitric oxide (NO)-mediated vasodilatory activity. Chemically, Nebivolol Hydrochloride is designated as (1RS,1′RS)-1,1′-[(2RS,2′SR)-bis(6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl)]-2,2′-iminodiethanol hydrochloride.