An emission line has been detected at 84.5 GHz in the direction of the radio continuum source Sgr B2. The new line frequency has been found to coincide with a laboratory measurement of the 5i-4o ( 2) transition of methyl alcohol (CH2OH). Calculations of the spontaneous emission rates from all energy levels of astrophysical interest have been performed; these indicate that not only the 5i-4o (E2) transition in Sgr B2 but also the AJ = 0, AK = 1(E1) transitions discovered in Orion A by Barrett et al. are likely to have population inversions. Additional searches for NH2CN, HCP, CH2Cl, ClCN, FeO, HC3HO, and NH2HCO were carried out in the 80-92-CiHz region without success.