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n4google.
isaphttp://webisa.webdatacommons.org/prov/
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provhttp://www.w3.org/ns/prov#
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Subject Item
isa:94811724
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The side groups R2, R3 and R4, which may be same, are hydrogen, small alkyl groups, aryles, or in pair, R2 and R4 or R3 and R4, and, in combination with two of the ring atoms, constitute a 5 or 6-membered aromatic ring, that may contain 0-2 heteroatoms such as O, S and N???R8, where R8 is an alkyl group.
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n4:com
Subject Item
isap:465231306
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isa:94811724