10-(4-Chlorophenyl)-7-methyl-5,6-dihydrobenzo[h]pyrazolo[5,1-b]quinazoline and 2-(4-chlorophenyl)-5-methyl-6,7-dihydrobenzo[h]pyrazolo[1,5-a]quinazoline: isomeric molecules linked into hydrogen-bonded dimers or π-stacked chains | Publicación