N3-arylspiroimidazolidine-2,4-diones N3arylspiroimidazolidine-2-thio-4-ones and 4-hydroxy derivatives. Synthesis and anthelmintic activity

1. Espada, M.
2. Pedregal, C.
3. Alonso, A.
4. Lopez, C.
5. Salazar, L.
6. Martinez, M.M.
7. Guillen, J.L.
8. Martinez, A.R.