Some vendors maintain excellent quality initially but decline over time
Over 4 to 6 draws from a single vial, you can lose 0.2 to 0.4mL of solution, which at 10mg/mL represents 2 to 4mg of tirzepatide
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Commercially available primer-probe sets were used (Applied Biosystems, Waltham, Massachusetts, USA)
All authors did the critical revision and language modification of the manuscript
step two, adding the solid phase resin, reacting for 24 hours at 80 in N-methylpyrrolidone, carrying out suction filtration, washing the solid phase resin with DCM, adding a DCM solvent of 25% TFA, and reacting for 2 hours at room temperature to obtain the 1- (2-hydroxyethyl) imidazole solid phase resin without tert-butyl protection or the 1- (3-hydroxypropyl) -1H-imidazole solid phase resin without tert-butyl protection