prov:value
| - wherein Y is a hydrogen atom or a bromine atom, n is an integer of 0, 1, 2, 3, or 4, R1 is an alkylene group or an arylalkylene group, and R2 is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group can be prepared by a process which comprises preparing a first reaction mixture by admixing (1) leucoquinizarin and, optionally, quinizarin, (2) an aminobenzene substituted with an a
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