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provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:27584136
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R2 is a member selected from the group consisting of branched or unbranched ??-hydroxyalkyl having from 4 to 8, preferably from 5 to 8 carbon atoms and in which the hydroxyl is separated from the xanthine nucleus by at least two carbon atoms, unbranched (??-1)-hydroxyalkyl having from 5 to 8 carbon atoms, branched (??-1)-hydroxyalkyl having from 4 to 8, preferably from 5 to 8 carbon atoms and in w
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isa:27584136