Table 1. Composition and HPLC-Retention Times of the Prepared Peptides.

peptide	P1	P2	P3	P4	Mw (g/mol)	retention time (min)
1	Ph	R	Tbta	R	788.10	9.23
2	Ph	R	Ph	R	580.74	7.61
3	Ph	R	S-BrW	R	698.67	7.98
4	Ph	R	R-BrW	R	698.67	7.62
5	Ph	R	diBrOMe	R	768.56	8.11
6	Ph	R	OMeBip	R	686.86	8.18
7	Ph	R	diBrOMeBip	R	844.65	8.68
8	diBrOMe	R	diBrOMe	R	956.37	8.56
9	BrOMe	R	BrOMe	R	798.58	8.09
10	diBrOH	R	diBrOH	R	928.32	7.77
11	diBrOMe	R	W	R	807.59	8.18
12	diBrOMe	R	BrW	R	886.49	8.43
13	Br-Ind	R	diBrOMe	R	886.49	8.47
14	Ph	R	Bip	KN(Me)3	671.91	8.19
15	Ph	R	Bip	C5N(Me)3	656.90	8.55
16	Ph	KN(Me)3	Bip	R	671.91	8.20
17	Ph	KN(Me)3	Bip	KN(Me)3	686.98	8.15
18	Ph	R	diBrOMe	C5N(Me)3	768.62	8.45
19	diBrOMe	K	diBrOMe	K	900.35	8.47

^aTri-tert-butyl tryptophan.