5-(5-carboxy-2,4-dihydroxyphenyl)-1-(2-methylphenyl)-1H-pyrazole 、
叔丁基二甲基氯硅烷 以gives the compound 5-(5-carboxy-2,4-di-(tertbutyldimethylsilyloxy)phenyl)-1-(2-methylphenyl)-1H-pyrazole (“1f”)的产率得到5-(5-carboxy-2,4-di-(tert-butyldimethylsilyloxy)phenyl)-1-(2-methylphenyl)-1H-pyrazole