ethyl pyridineethylpyridine乙基: aethylis; ethyl; ethyl group吡啶: pyridine; pyridina; azine二乙基吡啶: parvoline甲基乙基吡啶: methyl ethyl pyridine4-乙基-2-甲基吡啶翁: collidinium下载手机词典可随时随地查词查翻译