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Paliperidone Palmitate (3-{2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl}-2-methyl-4-oxo-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-9-yl hexadecanoate) is the palmitate ester prodrug of the atypical antipsychotic Paliperidone. Structurally, Paliperidone Palmitate consists of a benzisoxazole ring system fused to a piperidine moiety, connected via an ethyl linker to a tetrahydropyridopyrimidinone core bearing a 9-O-palmitoyl ester.

Palmitic Anhydride (hexadecanoic anhydride) is a long-chain (C16) aliphatic carboxylic acid anhydride derived from palmitic acid, a saturated fatty acid found abundantly in natural sources such as animal fats and vegetable oils. Structurally, Palmitic Anhydride consists of two hexadecanoyl (palmitoyl) groups linked through an anhydride bond (—C(=O)—O—C(=O)—). This symmetric structure confers potent acylating capability, making Palmitic Anhydride an efficient reagent for introducing palmitoyl (hexadecanoyl) functionality into other organic molecules. Palmitic Anhydride is widely used as a chemical intermediate in the synthesis of pharmaceuticals, cosmetics, surfactants, lubricants, plasticizers, and other specialty chemicals.

Paliperidone (3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidin-1-yl]ethyl]-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one), also known as 9-hydroxyrisperidone, is the primary active metabolite of the atypical antipsychotic risperidone. Structurally, Paliperidone features a benzisoxazole ring system fused to a piperidine ring, connected via an ethyl linker to a tetrahydropyridopyrimidinone core bearing a hydroxy group at the 9-position.

1‑Benzyl‑4‑hydroxy‑2‑methyl‑1H‑benzo[d]imidazole‑6‑carboxylic acid (CAS 1640981‑19‑6) is a substituted benzimidazole derivative featuring a 6,5‑fused aromatic heterocyclic system. The molecule incorporates a benzyl group at the 1‑position, a 4‑hydroxy substituent, a 2‑methyl group, and a carboxylic acid at the 6‑position, molecular formula C₁₆H₁₄N₂O₃ and molecular weight 282.29 g/mol.

(R)-5,7‑Difluorochroman‑4‑ol (CAS 1270294‑05‑7) is a chiral chromanol derivative featuring a benzodihydropyran (chroman) scaffold with fluorine substituents at the 5‑ and 7‑positions and a hydroxyl group at the 4‑position in the R‑configuration. The molecule consists of a fused benzene‑dihydropyran ring system with two fluorine atoms on the aromatic ring and a chiral secondary alcohol at C4, molecular formula C₉H₈F₂O₂ and molecular weight 186.16 g/mol.

4‑Hydroxy‑N,N,2‑trimethyl‑1‑tosyl‑1H‑benzo[d]imidazole‑6‑carboxamide (CAS 942195‑86‑0) is a complex benzimidazole derivative featuring a 6,5‑fused aromatic heterocyclic system. The molecule incorporates a 4‑hydroxy substituent, a 2‑methyl group, an N,N‑dimethyl carboxamide at the 6‑position, and a para‑toluenesulfonyl (tosyl) protecting group on the imidazole nitrogen, molecular formula C₁₈H₁₉N₃O₄S and molecular weight 373.43 g/mol.