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RIC (m/z = 239 + 237+ 225 + 211 + 197) for Raritan amber form 1 (Bleb 3) showing distribution of C-ring aromatic diterpenes. Compounds labeled † and * are assigned as methyl 17-nor dehydroabietate (XVIb) and methyl 17-nor calitrisate (XVIIb) respectively. However, due to the low abundance and coeleution of these eluants with other analytes, these assignments are tentative only.
