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US5596103A Process for preparing benzopyran compounds 失效
制备苯并吡喃化合物的方法

Process for preparing benzopyran compounds
摘要:
This invention comprises a process for preparing benzopyran derivatives represented by formula (I) ##STR1## in which, R.sup.1 is C.sub.1-20 alkyl, C.sub.2-20 alkenyl, C.sub.2-20 alkynyl, or a group of structure (i), (ii) or (iii). ##STR2##
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