123731-51-1Relevant academic research and scientific papers
SYNTHESIS OF SOME NEW PHENYL 2H-1-BENZOPYRAN-2-ONES: NOVEL STRUCTURE FOR NIVEGIN
Parmar, Virender S.,Singh, Suddham,Vardhan, Anand,Sharma, Rita
, p. 1839 - 1844 (1989)
The constitution of nivegin, occurring in Echinops niveus has been revised by synthesising 5,7-dihydroxy-4-(4-hydroxyphenyl)-2H-1-benzopyran-2-one(1), 5,7-dihydroxy-3-(4-hydroxyphenyl)-2H-1-benzopyran-2-one(2) and their derivatives 3-6.It has been assigned a novel structure having the phenyl substituent in the benzenoid ring of the coumarin nucleus - 4,5-dihydroxy-7-(4-hydroxyphenyl)-2H-1-benzopyran-2-one(11).
