XIC of MAAs (3ppm) in Gymnogongrus devoniensis separated on the Zic-cHilic column. Palythene/Usujirene: m/z 285.1440, error −1.75 ppm; Mycosporine-glycine: m/z 246.0971, error −0.41 ppm; Aplysiapalythine B: m/z 273.1436, error −3.3 ppm; Mycosporine-glycine-valine: m/z 345.1653, error −2.06 ppm; Palythine-glutamic-acid: m/z 317.1338, error −1.58 ppm; Porphyra-334: m/z 347.1447, error −0.86 ppm; Mycosporine-2-glycine: m/z 303.1185, −0.66 ppm; Mycosporine methyl-amine threonine: m/z 303.1549, error −0.66 ppm; Aplysiapalythine A: m/z 303.1542, error −2.97 ppm; Palythinol: m/z 303.1548, error −0.66 ppm; Shinorine: m/z 333.1286, error −1.8 ppm; Asterina-330: m/z 289.1389, −1.73 ppm; Palythine: m/z 245.1123, error −2.85 ppm; Palythine-serine: m/z 275.1234, error −1.45 ppm.