1.
Farmaco Prat
; 36(12): 553-8, 1981 Dec.
Artículo
en Italiano
| MEDLINE
| ID: mdl-7319021
2.
Farmaco Sci
; 32(3): 186-94, 1977 Mar.
Artículo
en Italiano
| MEDLINE
| ID: mdl-852567
RESUMEN
7-Theophylline derivatives with 4,6-dihydroxy-5-pyrimidinyl-, 3-oxopiperazinylmethyl- and 4-methyl-3,5-dioxopiperazinylmethyl substituents are described: they can be viewed as structural analogues of a nucleic base pair in the Hoogsteen arrangement; theobromine could be converted into the 1-(3,5-dioxo-4-pyrazolidinyl) derivative, similarly analogous to a base pair in the Watson-Crick arrangement.