Pentavalent P Having The Structure (c)-p(=x) (x) (n) Or (c)-p(=x) (n)2 Where X Is Chalcogen (9/44; 9/44a; 9/44a1; 9/44a6; 9/44a9; 9/44b; 9/44b1; 9/44b9) Patents (Class 987/140)
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