In direct El MS (70 eV), a molecular ion was also
detected at m/z 246 (Fig. 1 ). Prominent ions due to fissions
of hydroxyl and methyls at m/z 228[M-H20] +,
213[M-H20-CH~] § and 187[M-H-H20-2CH3] + were
also shown, suggesting that the structure contains a tertiary
alcohol moiety. Moreover, the presence of an ion
at m/z 77 indicated that an aromatic ring is present (Silverstein
et al., 1991 ).