Diazaspiro [4.4] nonane was synthesized from malononitrile as the starting material by a series of nucleleophilic displacement, hydrolytic cyclization and carbonyl reduction.是什么意思_Diazaspiro [4.4] nonane was synthesized from malononitrile as the starting material by a series of nucleleophilic displacement, hydrolytic cyclization and carbonyl reduction.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句