. Author manuscript; available in PMC: 2014 Sep 1.

Published in final edited form as: Bioorg Med Chem. 2013 Jul 2;21(17):5029–5038. doi: 10.1016/j.bmc.2013.06.052

Table 1.

MS and HPLC characterization of compounds 2–7.

Compound	Formula [M]	Calculated Masses [Ion]	Masses Found (error)	t_R (min)	Yields (%)
2^a	C₆₀H₈₅N₁₆O₁₉¹⁵¹Eu	1486.5532 [M+1]⁺	1486.5526 (0.4 ppm)	10.5	20
2^a	C₆₀H₈₅N₁₆O₁₉¹⁵³Eu	1488.5546 [M+1]⁺	1488.5549 (0.2 ppm)
3^a	C₇₄H₁₀₈N₁₉O₂₅¹⁵¹Eu	1815.7119 [M+1]⁺	1815.7113 (0.3 ppm)	12.9	9
3^a	C₇₄H₁₀₈N₁₉O₂₅¹⁵³Eu	1817.7133 [M+1]⁺	1817.7139 (0.3 ppm)
4^a	C₁₀₄H₁₅₅N₂₆O₃₃¹⁵¹Eu	817.0254 [M+3]³⁺	817.0248 (0.7 ppm)	12.6	11
4^a	C₁₀₄H₁₅₅N₂₆O₃₃¹⁵³Eu	817.6925 [M+3]³⁺	817.6926 (0.1 ppm)
5^b	C₃₈H₅₀N₁₄O₅	783.4161 [M+1]⁺	783.4158 (0.4 ppm)	13.6	39–45
6^b	C₅₂H₇₃N₁₇O₁₁	556.7910 [M+2]²⁺	556.7909 (0.3 ppm)	15.4	42–50
7^b	C₈₂H₁₁₈N₂₄O₁₉	872.4575 [M+2]²⁺	872.4567 (0.9 ppm)	14.6	50–60

Analyzed on a 3 × 150 mm 3.5 Å Waters C₁₈ X-Bridge column, flow rate 0.3 mL/min, linear gradient from 10–60% B in A over 45 min, where A is 0.1% TEAA in water (pH 6) and B is 90% acetonitrile and 10% A, detection at 220 and 280 nm. Purity >95%. Characterized by FT-ICR MS.

Analyzed on a 3 × 150 mm 3.5 Å Waters C₁₈ X-Bridge column, flow rate 0.3 mL/min, linear gradient from 10–90% B in A over 45 min, where A is 0.1% TFA in water and B is 0.1% TFA in acetonitrile, detection at 220 and 280 nm. Purity >95%. Characterized by ESI MS.