Florfenicol

25‑Hydroxyvitamin D₃ is the major circulating metabolite of vitamin D₃, produced in the liver, and is widely used in animal nutrition as a highly bioavailable source of vitamin D activity to support calcium metabolism, bone health, and overall performance in livestock and poultry.

5-Fluoro-L-tryptophan is a colorless crystalline solid with chemical stability. It is soluble in water but insoluble in organic solvents.

7-Methyl-L-tryptophan is an organic compound that is a crystalline white solid. As a key precursor in the biosynthesis of nonribosomal peptide antibiotics, it participates in the synthesis of potent antibacterial agents and their analogues, and has application value in the field of anti‑infective research.

Astaxanthin is a natural pigment found in crustaceans, green algae (Haematococcus pluvialis), and red yeast (Phaffia rhodozyma), belonging to the carotenoid family, and is red in color.

Canthaxanthin is a natural or synthetic orange-red carotenoid pigment. It is widely found in mushrooms, algae, crustaceans (such as shrimp and crab), and fish in nature.

Key intermediate for Florfenicol

3-(1-Naphthyl)-L-alanine is an alanine derivative.

CAS No.: 55516-54-6


molecular formula: C13H13NO2


molecular weight: 215.25

L-3-Pyridylalanine is an alanine derivative.

CAS No.: 64090-98-8

molecular formula: C8H10N2O2

molecular weight: 166.18

L‑BASE is a high‑purity chiral intermediate developed and manufactured by Leadsynbio using proprietary enzymatic catalysis technology, serving as a key building block for the synthesis of active pharmaceutical ingredients and nutritional compounds.

L-Norleucine is an important non-proteinogenic amino acid that plays a multifaceted role in basic biochemical research and the investigation of disease mechanisms.

L-Norvaline is a non-proteinogenic amino acid that exhibits biological activities including antioxidant effects, improvement of insulin resistance, and promotion of nitric oxide production. It can also serve as a pharmaceutical intermediate in the synthesis of ACE inhibitors.

L-Penicillamine is a key intermediate of many drugs.

CAS No.: 1113-41-3

molecular formula: C5H11NO2S

molecular weight: 149.21