%0 Journal Article %A Fallah-Mehrjardi, Mehdi, Kiasat, Ali Reza %T Silica sulfuric acid mediated protection of carbonyl groups as 2,4- dinitrophenylhydrazone %J Journal of the Iranian Chemical Research %V 2 %N 4 %P 243-246 %D 2009 %R %U https://sanad.iau.ir/fa/Article/1085415