Table 3: Pseudomolecular ions and main product ions obtained in positive mode from ESI-MSn (n=1, 2) analyses of purified active HPLC fractions from ethyl acetate extract of Pseudomonas sp. cell-free supernatants.

Producing strainName[M+H]+Main product ions in MS-MS (m/z)Rt [min]Relative area ()Anti-L. pneumophila activityReference

P. putida MFAF88Putisolvin I1380.7454; 567; 863; 927; 1040; 116914.776.6+ [20]
Putisolvin II1394.71054; 118315.723.4-

P. fluorescens PfA7bMassetolide E1112.6496; 595; 829; 70013.954.8+ [37]
Viscosin/Massetolide F1126.6496; 595; 714; 84314.845.2+

P. fluorescens MFAD21cPPZPM-1a1253.8284; 496; 609; 970; 123511.261.7+ [38]
PPZPM-2a1239.8284; 496; 595; 956; 122112.238.3+

P. fluorescens MFAH4aPPZPM-1a1253.8284; 496; 609; 970; 123511.253.1+ [38]
PPZPM-2a1239.8284; 496; 595; 956; 122112.146.9+

P. sp DSS73Amphisin1395.6482; 595; 997; 111212.578.4+[39, 40]
Amphisin-like1384.7482; 595; 997; 109811.918.2-
Tensin1409.5482; 595; 1011; 102613.23.4-

P. fluorescens MFAO2Amphisin1395.6482; 595; 997; 111212.76.1-[39, 40]
Tensin1409.8482; 595; 1011; 102613.293.9+