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. 2015 May 27;5:10637. doi: 10.1038/srep10637

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Copyright © 2015, Macmillan Publishers Limited

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UPLC-TOF MS (ESI⁺) analysis of a MeOH extract of B. cereus strain F3876/87 with peak assignment of two didepsipeptide methyl esters with m/z 240.1212 (DP2a; C₁₀H₁₉NO₄Na, +0.1 ppm) and m/z 254.1368 (DP2b; C₁₁H₂₁NO₄Na, +2.0 ppm), the tetradepsipeptide methyl ester with m/z 453.2576 (DP4; C₂₁H₃₈N₂O₇Na, -1.5 ppm), two hexadepsipeptide methyl esters with m/z 624.3472 (DP6a; C₂₉H₅₁N₃O₁₀Na, +0.8 ppm) and m/z 638.3629 (DP6b; C₃₀H₅₃N₃O₁₀Na, +0.9 ppm), the octadepsipeptide methyl ester (DP8; m/z 837.4806; C₄₀H₇₀N₄O₁₃Na, -4.7 ppm), two decadepsipeptide methyl esters with m/z 1008.5733 (DP10a; C₄₈H₈₃N₅O₁₆Na, +0.7 ppm) and m/z 1022.5889 (DP10b; C₄₉H₈₅N₅O₁₆Na, +0.8 ppm), and the dodecadepsipeptide methyl ester (DP12) with m/z 1207.6941 (C₅₈H₁₀₀N₆O₁₉Na, +1.0 ppm).