The synthesis of beef β-MSH (I) carrying protecting groups on Nα (carbobenzoxy-), Nε (tosyl-), β-COOH (Asp1 with β-CONH2, Asp18 with β-COOCH3), γ-COOH (Glu8 with γ-CONH2), and α-COOH (Asp18 with β-COOCH3) is described. The compound elicits an activity (in vitro, frog skin) of 1.4 × 107 U/g as compared to 1.2 × 109 U/g for βb-MSH and 3.7 × 107 U/g for αb-ACTH.
牛肉的合成β-MSH(I)上携带保护基Ñ α(carbobenzoxy-),N ε(
甲苯磺酰基),β-COOH(
天冬氨酸1与β-CONH 2,A
SP 18与β-COOCH 3),γ -COOH(谷
氨酸8与γ-CONH 2),和α-COOH(
天冬氨酸18与β-COOCH 3)进行说明。该化合物引起的活性(在体外的1.4×10,蛙皮)7相比U / g至1.2×10 9 U /克为β b -MSH和3.7×10 7为αU /克b -ACTH。