Cytosine derivatives having histamine H.sub.2 -antagonist activity
 This invention relates to cytosine derivatives which have histamine H.sub.2 -antagonist activity. A specific compound of this invention is 4-[3-(3-(piperidinomethyl)phenoxy)propylamino]-pyrimidin-2-thione. 
Smith Kline & French Laboratories Limited
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Thomas H.
Brown