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| | Patent 4435533: 4-Hydroxy-5-(substituted phosphinyl)ethyleneureas |
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 | | Tsolis; Alexandros K. (171 Old National Rd., Arachovitika, Patra, GR);Mikroyannidis; Ioannis A. (Navmahias Elis 48-52, Patra, GR) |
 | | A compound of the formula: ##STR4## wherein R.sub.1 and R.sub.2 are selected from the group consisting of alkoxy of 1 to 4 carbon atoms, cyclohexyloxy, phenoxy, alkoxy containing chlorine, alkoxy containing bromine and hydroxy. |
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