通过环氧化和氧化就得到外消旋的含十八个碳的昆虫返动激素.Epoxidation and oxidation gave the racemic C 18 - juvenile hormone.发现旋光基质有外消旋作用.Racemization is found with optically active substrates.外消旋体是不旋光的.The racemate is optically inactive....

“消旋”的英语可以翻译为：acemization，despun ...

“消旋”的拼音为：xiāo xuán...