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. 2021 Mar 22;10(3):337. doi: 10.3390/antibiotics10030337

Table 2.

Key high resolution mass spectrometry (HRMS) data for bioactive samples, and proposed structures as shown in the Supplementary Materials file 1.

Sample Molecular Ion (m/z) Molecular Formula Proposed Structures Spectra MS/MS NMR Analyses
19,033 326.37813
[M + H]+
[C22H48N]+
Calc. = 326.37802
(∆m = 0.11 ppm)
RDBE = 0
3 Figure S1 Table S2
Figure S11
-
20,608 332.33115
[M + H]+
[C23H42N]+
Calc = 332.33118
(Δm = 0.03 ppm)
RDBE = 4
1,2 Figure S3 Table S3
Figure S13
-
26,051 368.42508
[M + H]+
[C25H54N]+
Calc. = 368.42495
(∆m = 0.13 ppm)
RDBE = 0
4,5 Figure S5 Table S4
Figure S15
-
25,663 306.0635
[M+Na]+
[C18H9ON3]
Calc. = 306.0637
(∆m = 0.8 ppm)
RDBE = 16
6 Figure S7 - Table S5
Figure S20
25,663 361.9925
[M + H]+
[C18H8BrN3O]
Calc. = 361.9923
(∆m = 0.5 ppm)
RDBE = 16
7 Figure S7 -
Table S6
Figure S21
26,104 467.117
[M + H]+
[C30H17N2O4]
Calc. = 467.118
(∆m = 1.9 ppm)
RDBE = 0
8 Figure S9 - Table S7
Figures S22–S25

† The same active species was observed for all five fractions SN00760947, SN00760956, SN00732222, SN00734298 and SN00760958. ‡ RDBE = ring or double bond equivalents.