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

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Scheme 4. Proposed fragmentation mechanism for macrocycle (9).…………………………………...…..18<br />

Figure 31. Tandem ESI-MS 2 spectrum for macrocycle (9)……...………………………………..………...19<br />

Scheme 5. Proposed fragmentation mechanism for macrocycle (9)……………..………………….……..19<br />

Figure 32. 1 H-NMR spectrum for macrocycle (13)………………………………………………………...20<br />

Figure 33. ESI-MS spectrum for macrocycle (13)……………………...………………………………….20<br />

Figure 34. Tandem ESI-MS 2 spectrum for macrocycle (13)………...…………………..………………….20<br />

Scheme 6. Proposed fragmentation mechanism macrocycle (13)………………………………….……....21<br />

Figure 35. 1 H-NMR spectrum for macrocycle (14)………………………………………………………...21<br />

Figure 36. ESI-MS spectrum for macrocycle (14)……………………...………………………………….22<br />

Figure 37. Tandem ESI-MS 2 spectrum for macrocycle (14)………...…………………..………………….22<br />

Scheme 7. Proposed fragmentation mechanism for macrocycle (14)…………………………..…………..22<br />

Figure 38. 1 H-NMR spectrum for macrocycle (17)………………………………………………………...23<br />

Figure 39. 1 H-NMR spectrum for macrocycle (17)………………………………...……………………....23<br />

Figure 40. 1 H-NMR spectrum for macrocycle (17)……..………………...………………………………..24<br />

Figure 41. APCI-MS 2 spectrum for macrocycle (17)……………………………………………………....24<br />

Figure 42. APCI-MS 2 spectrum for macrocycle (17)………………………….…………………………...24<br />

Figure 43. Tandem APCI-MS 2 spectrum for macrocycle (17)…………………………..………………...25<br />

Scheme 8. Proposed fragmentation mechanism for macrocycle (17)………………………..……………..25<br />

Figure 44. Tandem APCI-MS 2 spectrum for macrocycle (17)…………………………...………………..25<br />

Scheme 9. Proposed fragmentation mechanism for macrocycle (17)……………………………..………..26<br />

Figure 45. 1 H-NMR spectrum for macrocycle (10)………………………………………………………...26<br />

Figure 46. ESI-MS spectrum for macrocycle (10)……….……………………………….………………..27<br />

Figure 47. Tandem ESI-MS 2 spectrum for macrocycle (10)………….…………….………………..…….27<br />

Figure 48. 1 H-NMR spectrum for macrocycle (11)………………………………………………………...27<br />

Figure 49. APCI-MS spectrum for macrocycle (11)……………………………………….….…………...28<br />

Figure 50. Tandem ESI-MS 2 spectrum for macrocycle (11)……………………………….………..…….28<br />

Scheme 10. Proposed fragmentation mechanism for macrocycle (11)…………………………..………....29<br />

Figure 51. APCI-MS 2 spectrum for macrocycle (12)……………………………………………………....29<br />

Figure 52. Tandem APCI-MS 2 spectrum for macrocycle (12)……………………………….…………....30<br />

Figure 53. 1 H-NMR spectrum for macrocycle (12)………………………………………………………...30<br />

Figure 54. APCI-MS 2 spectrum for macrocycle (12)………………………………..……………………..30<br />

Scheme 11. Proposed fragmentation mechanism for macrocycle (12)……………….……..……………...31<br />

Figure 55. Tandem APCI-MS 2 spectrum for macrocycle (12)……………………………….…………….32<br />

Scheme 12. Proposed fragmentation mechanism for macrocycle (12)……………….……..……………...32<br />

Figure 56. 1 H-NMR spectrum for macrocycle (15)………………………………………………………...33<br />

Figure 57. ESI-MS spectrum for macrocycle (15)….…………………………………….………………..33<br />

Figure 58. Tandem ESI-MS 2 spectrum for macrocycle (15)……………………………………….………33<br />

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