已知a是一种相对分子质量为28的气态烯烃它的产量可以用来衡量一个国家的石油化工水平.现以a为主要原料合成一种具有果香�的物质e其合成路线如 Template




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tomski已知a是一种相对分子质量为28的气态烯烃它的产量可以用来衡量一个国家的石油化工水平.现以a为主要原料合成一种具有果香�的物质e其合成路线如 coloring