prov:value
| - Other suitable hydroxyureas are disclosed in, e.g., U.S. Pat. No. 4,299,778, wherein R1 is a phenyl group substituted with one or more fluorine atoms; R2 is a cyclopropyl group; and R3 and X is H. Other suitable hydroxyureas are disclosed in, e.g., U.S. Pat. No. 5,066,658, wherein R2 and R3 t
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