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Stability of Drugs and Dosage Forms Sumie Yoshioka

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2.2. • Factors Affecting Chemical <strong>Stability</strong> 45<br />

Figure 12. Time courses <strong>of</strong> epimerization <strong>and</strong> hydrolysis <strong>of</strong> etoposide (pH 10, 37°C). (Reproduced from Ref. 157<br />

with permission.)<br />

(2.31)<br />

(2.32)<br />

where

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