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The Development of Novel Antibiotics Using ... - Jacobs University

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Intens.<br />

[%]<br />

100<br />

+MS<br />

517.2<br />

Exact structure<br />

80<br />

19<br />

60<br />

1065.4<br />

40<br />

20<br />

0<br />

500 1000 1500 2000 2500 m/z<br />

Figure 48. Tandem ESI-MS for host-guest complex (7 and 9)/19 (MS 2 for m/z 1065).<br />

Intens.<br />

[%]<br />

100<br />

+MS<br />

517.2<br />

1005.3<br />

Exact structure<br />

80<br />

60<br />

40<br />

20<br />

0<br />

500 1000 1500 2000 2500 m/z<br />

Figure 49. Tandem ESI-MS for host-guest complex (7 and 9)/19 (MS 2 for m/z 1005).<br />

Intens.<br />

[%]<br />

100<br />

80<br />

7 =<br />

9 =<br />

20 =<br />

876.3880<br />

9<br />

+MS<br />

936.4081<br />

20<br />

60<br />

40<br />

775.4182<br />

20<br />

924.4069<br />

0<br />

780 800 820 840 860 880 900 920 940 m/z<br />

Figure 50. ESI-TOF/MS showing recognition <strong>of</strong> oligopeptide 20 by receptors 7 and 9.<br />

23 | S

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