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Hickson and Welch Ltd
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Hickson and Welch Ltd
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Application filed by Hickson and Welch LtdfiledCriticalHickson and Welch Ltd
Application grantedgrantedCritical
Publication of FR1199528ApublicationCriticalpatent/FR1199528A/en
C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
C07D249/16—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms condensed with carbocyclic rings or ring systems
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
FR1199528D1957-03-011958-03-01
Advanced optical brighteners and their preparation process
ExpiredFR1199528A
(en)