Number | Date | Country | Kind |
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59-60198 | Mar 1984 | JPX |
Number | Date | Country |
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1259054 | Jan 1972 | GBX |
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Taylor et al, Textbook "Introductory Medicinal Chemistry" John Wiley and Sons, 1981 N.Y., pp. 112-113. |
Schueler, "Molecular Modification in Drug Design", Am. Chem. Soc., 1964 Wash. D.C. 1964 pp. 140-147. |