L 683519 is one of the Tacrolimus impurities with immunosuppressant and could restrain the activity of FK-506 binding protein.

132172-14-6

C43H67NO12

789.99

L683519;L-683519;13-Desmethyl FK 506;L 683519

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years