Table 3.
Identification of Bioactive Marker Ions from Alternaria Sp.
| marker ion | ion (molecular formula, δ (ppm)) | adducts and fragments (molecular formula, δ (ppm)) | tentative identification |
|---|---|---|---|
| 1 | 273.0756 [M+H]+ (C15H13O5, 0.5) | 255.0699 [M+H-H2O]+ (C15H11O4, 4.2) | Alternariol monomethyl ethera |
| 2 | 198.1124 [M+H]+ (C10H17NO3, 0.4) | Tenuazonic acida | |
| 3 | 400.2480 [M+H]+ (C24H34NO4, 0.6) | 422.2292 [M+Na]+ (C24H33NO4Na, 1.6) | Altersetina |
| 382.2375 [M+H-H2O]+ (C24H32NO3, 0.7) |
a
Previously reported from cultured Alternaria spp.31