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

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Intens.<br />

7<br />

x10<br />

200.7<br />

1.5<br />

1.0<br />

0.5<br />

0.0<br />

200 400 600 800 1000 1200 1400 m/z<br />

Figure 15. ESI-MS spectrum for (2S,3S)-2,3-dihydroxy dicarbohydrazide (6) from H 2 O (Positive mode).<br />

Intens.<br />

4<br />

x10<br />

1.0<br />

110.8<br />

112.8<br />

0.8<br />

0.6<br />

0.4<br />

0.2<br />

140.7<br />

168.7 182.7<br />

0.0<br />

110 120 130 140 150 160 170 180 190 m/z<br />

Figure 16. Tandem ESI-MS 2 spectrum for (2S,3S)-2,3-dihydroxy dicarbohydrazide (6) from H 2 O (Positive<br />

mode).<br />

Scheme 2. Proposed fragmentation mechanism for (2S,3S)- 2,3-dihydroxy dicarbohydrazide (6).<br />

S11

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