+++Thanks_macro_1 article from Springer link

[pendyala123]

Synthesis and some properties of 4-oxo-3,4-dihydro- and 2,4-dioxo-1,2,3,4-tetrahydropyrimido[5,4-b]indoles

S. V. Simakov, V. S. Velezheva, V. V. Dvorkin, N. N. Suvarov
» Chemistry of Heterocyclic Compounds, vol 21, Issue 5 , pp 533-537

DOI:

http://dx.doi.org/10.1007/BF00506067

Код: Выделить всё

http://link.springer.com/article/10.1007/BF00506067

[macro]