Table 1.

Characterization data for the new peptides^.NH₂-Xaa₁-Xaa₂-Xaa₃-NH₂1–6 (TFA salts).

Compounds	Xaa1	Xaa2	Xaa3	Rt (HPLC)a min.	MS calcd.	MS found
1	Tyr	Phe	Asp	12.44	442.19	443.31
2	His	Phe	Glu	11.57	430.21	431.41
3	Glu	Ile	Thr	11.78	360.41	361.56
4	Gln	Asp	Ser	11.11	347.14	348.25
5	Asn	Asp	Ser	11.08	333.13	334.18
6	Glu	Phe	Glu	11.70	422.43	423.51

^aAnalytical RP HPLC: C18 linear gradient of H₂O/acetonitrile 0.1% TFA starting from 5% acetonitrile to 95% acetonitrile in 30 min (solvent ramp: from 0 to 5 min: 5% ACN; from 5 to 20 min: 80% ACN; from 20 min to 25 min: 20% ACN; from 25 min to 30 min: 5% ACN).