Most organic drugs contain one acid group, usually a carboxylic acid, -COOH, or one basic primary, secondary, or tertiary amino group, NC 1-3, [3,22,27,28,29] that determines the acid-base ...
f One COOH group on succinic acid is esterified with the position 21 OH group of methylprednisolone, and the hydrogen from the other succinic COOH is replaced to make the sodium salt. g Inorganic ...