Fig. 4. Degradation curves during ozonation of MOL in deionized H₂O (a and c) and in +10% BuOH (b and d) with parent drug MOL [M + H]⁺ = 330.1363 (black diamonds) and moderately or barely degraded end products [M + H]⁺ = 133.0253 (red circles), [M + H]⁺ = 248.1139 (green squares) and [M + H]⁺ = 346.1259 (blue triangles) in (a) and (b) and intermediate products in (c) and (d) of [M + H]⁺ = 314.1312 (purple diamonds), [M + H]⁺ = 315.1204 (brown circles), [M + H]⁺ = 559.2288 (yellow diamonds) and [M + H]⁺ = 626.2354 (dark blue triangles).