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US4587340A Biopterin analogs 失效
生物蝶呤类似物

Biopterin analogs
Abstract:
This invention provides the intermediates of formula II-A below, useful to make the pterin compounds of formula I below. The pterin compounds are used in human and veterinary medicine. ##STR1## wherein R represents a lower alkyl of 1 to 8 carbons.
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