fluoro 2 dinitrobenzene fdnb二: two4-二硝基苯腙: dnp-hydrazone2,4-二硝基苯肼: 2,4-dinitrophenylhydrazine; dnp-hydrazine2,4-二硝基苯腙: dnp-hydrazone2,4-二硝基苯胺: 2,4-dinitroaniline下载手机词典可随时随地查词查翻译