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[求助] 请问大气二次有机气溶胶(S0A)异戊二烯的示踪物标样在哪里可以买到

近期想做一些SOA的实验,买标样的时候发现文献中,异戊二烯的示踪物标样3-methyl-2,3,4-trihydroxy-1-butene,
2-methylthreitol 和2-methylerythritol在百灵威等网站上都查不到,是有别的名字还是什么,求助各位大神帮忙,谢谢!
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