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

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Intens.<br />

x10<br />

6<br />

5<br />

539.3<br />

4<br />

3<br />

2<br />

1<br />

259.1<br />

281.1<br />

517.3<br />

0<br />

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

Figure 32. ESI-MS spectrum for dicarbohydrazide (9), from H 2 O.<br />

HN<br />

N<br />

O<br />

S<br />

O<br />

O<br />

S<br />

O<br />

NH<br />

N<br />

O<br />

O<br />

N<br />

HN<br />

S<br />

O<br />

O<br />

O<br />

S<br />

O<br />

N<br />

NH<br />

(3S,4S,22S,23S)-16<br />

Figure 33. 1 H-NMR spectrum for macrocycle (16), DMSO-d 6 , 400 MHz.<br />

Intens.<br />

5<br />

x10<br />

1.5<br />

897.3<br />

1.0<br />

0.5<br />

0.0<br />

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

Figure 34. APCI-MS 2 spectrum for macrocycle (16), from DMSO.<br />

S14

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