The optimal conditions for synthesis of alkaligreen 4 include the carbamide and zinc chloride as catalyst, chloranil and bichrome.
合成碱绿色4的最佳条件包括：尿素和氯化锌作为催化剂，四氢呋喃和双色。
2
The optimal conditions for synthesis of alkaligreen 4 are reported, including the carbamide and zinc chloride as catalyst, chloranil and bichrome as oxidation agent in the acetic acid medium.
报道了合成碱性绿-4的最佳条件：在醋酸介质中，尿素、氯化锌为催化剂，四氯苯醌和重铬酸钾为氧化剂；
3
The whitey-gray of the alkali-patches, the brown of the dry earth, and the rusty green of the sagebrush filled the foreground, melting in the distance into a purple-gray.