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Smart Image Examples Embodiment 1 [0044] Example 1: Synthesis of Intermediate I [0045] [0046] R 1 =Fmoc, R 3 =Trt [0047] Weigh 50.01g Fmoc-L-His(Trt)-OH into 500ml tetrahydrofuran, stir, add 18.95g DIPEA (2.00eq) to the reaction flask, stir to dissolve, and add 20.12g EDCI (1.30eq) to the reaction flask in turn , 14.21g HOBt (1.30eq), 18.95g 2-aminoisobutyric acid tert-butyl ester hydrochloride (1.20eq), stirred for 5 hours, the reaction was complete, the reaction solution was concentrated, the residue was dissolved in 300ml EA, and the organic phase was washed with 300ml purified water 2 times, wash once with 300ml of saturated sodium chloride aqueous solution, separate the liquid, collect the organic phase, concentrate the organic phase to 100g, control the temperature to 0-15C, add the concentrated dropwise to 750ml of n-heptane for crystallization, and after the addition is complete , stirred at 0-15C for 30 minutes, filtered, and the filter cake was vacuum-dried to obtain 65.90 g of white so
Ensuring adequate protein intake (at least 0.7 to 1.0 grams per pound of lean body mass) and avoiding severely low-calorie diets can help maintain energy levels
It is found in many protein-rich foods and is also available as a supplement
Hyaluronic Acid Face Serum with GHK Copper Peptide Recipe
