20815-41-2Relevant articles and documents
Tetramethylguanidino-substituted pyrylium and thio pyrylium salts
Galezowski, Wlodzimierz,Leffek, Kenneth T.,Pruszynski, Przemyslaw
, p. 2390 - 2393 (2007/10/02)
Four new tetramethylguanidino-substituted pyrylium and thiopyrylium salt dyes have been prepared and their absorption maxima in the visible region measured.The positions of the absorption maxima are similar to those observed for thiopyrylium salt dyes use