单词	guanidine
释义	guanidine /ˈɡwɑːnɪdiːn / noun [mass noun] Chemistry A strongly basic crystalline compound, used in organic synthesis. An imide derived from urea; chemical formula: HNC(NH2)2. Although a molecule of guanidine contains only five hydrogen atoms, it can effectively store nine by extracting hydrogen from the water recovered from the exhaust.... However, experience with guanidine and biguanides prompted the development of metformin. When guanidine hydrochloride is present these complexes dissociate into smaller units. Origin Mid 19th century: from guano + -ide + -ine4.
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