The time required for drug concentration to reduce by half in the body.
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bis-N-[(S)-2-(pyrazol-4-ylmethoxycarbonylamino)-3-phenylpropyl]ethylamine
17α-<(phenylseleno)ethynyl>-17β-estradiol
2-Propenoic acid, 3-[4-(oxiranylmethoxy)phenyl]-, methyl ester
(SS,E)-N-(3-(3,4-dichlorophenyl)propylidene)-2-methylpropane-2-sulfinamide