ximelagatran (hydroxylamine form) A member of the class of azetidines that is melagatran in which the carboxylic acid group has been converted into the corresponding ethyl ester and in which the amidine group has been converted to the corresponding hydroxylamine. Tautomeric with the oxime form of ximelagatran. secondary carboxamide tertiary carboxamide ethyl ester hydroxylamines azetidines ximelagatran