Table 1.

compound list of the original core with the new linkers.

Entry	Addition of linkers: 2a-f	% yield of 3a-f	Molecular weight 3a-f
1		80%	660.72
2		80%	674.75
3		57%	676.72
4		43%	692.72
5		31%	858.94
6		31%	899.00