Table 1 MALDI-TOF-MS results of Samp
Peak | Possible compound | Molecular formula, [M-H]− | Mono-isotopic mass, [M-H]− |
|---|---|---|---|
b | DHA | C20H27O2 | 299.2018 |
a | Abietic acid | C20H29O2 | 301.2173 |
c | oxo-DHA | C20H25O3 | 313.1786 |
d | OH-DHA/oxo-abietic acid | C20H27O3 | 315.1946 |
e | OH-abietic acid | C20H29O3 | 317.2039 |
f | OH-oxo-DHA | C20H25O4 | 329.1741 |
g | diOH-DHA | C20H27O4 | 331.1883 |
h | Peroxy-abietic acid | C20H29O4 | 333.2007 |
i | diOH-oxo-DHA | C20H25O5 | 345.1679 |
j | triOH-DHA | C20H27O5 | 347.1805 |
k | triOH-abietic acid | C20H29O5 | 349.1953 |
l | tetraOH-abietic acid | C20H29O6 | 365.1908 |