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n4google.
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:382162131
rdf:type
prov:Entity
prov:value
group containing not more than about 6 carbon atoms, or one of R3 and R4 is a hydrogen atom and the other is a toluenesulfonyl group, or R3 and R4 together with the intervening nitrogen atom form a nitrogenous heterocyclic ring containing no heteroatoms other than said intervening nitrogen atom, which process comprises reacting a corresponding squaric acid derivative of the formula: ##STR22## in w
prov:wasQuotedFrom
n4:com
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isa:382162131