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

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Intens.<br />

4<br />

x10<br />

1047.5<br />

1.00<br />

0.75<br />

0.50<br />

0.25<br />

652.3 782.4 949.4<br />

0.00<br />

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

Figure 28. APCI-MS spectrum for macrocycle (15), from DMSO.<br />

Scheme 2. Suggested fragmentation mechanism for macrocycle (15).<br />

Intens.<br />

5<br />

x10<br />

1.25<br />

1.00<br />

0.75<br />

0.50<br />

0.25<br />

0.00<br />

821.4 901.5 949.4 410.3<br />

490.3<br />

1019.5<br />

1048.5<br />

524.3 604.3<br />

314.2<br />

638.3<br />

300 400 500 600 700 800 900 1000 m/z<br />

Figure 29. Tandem APCI-MS 2 spectrum for macrocycle (15), from DMSO.<br />

S12

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