TABLE 4.
Scytocyclamides A–C from S. hofmannii PCC 7110.
| tR |
[M + H]+ |
||||
| 11-residue laxaphycins | (min) | Exp (m/z) | Δ (ppm) | Formula | RI (%) |
| Scytocyclamide A | 3.46 | 1223.7399 | 0,0 | C61H99N12O14 | 98 |
| Scytocyclamide A2 | 3.56 | 1207.7422 | −2.3 | C61H99N12O13 | 2 |
| 12-residue laxaphycins | |||||
| Scytocyclamide B | 3.10 | 1367.8173 | 2.1 | C63H111N14O19 | 50 |
| Scytocyclamide B2 | 3.14 | 1351.8169 | −2.0 | C63H111N14O18 | 18 |
| Scytocyclamide B3 | 3.27 | 1335.8228 | −1.4 | C63H111N14O17 | 10 |
| Scytocyclamide C | 3.23 | 1351.8190 | −0.4 | C63H111N14O18 | 22 |
Retention times (tR), experimental (Exp) mass of protonated scytocyclamides, difference (Δ) to calculated mass, chemical formula, and relative intensity (RI) of pronated scytocyclamides.