13C Nuclear magnetic resonance spectrosc
β
V. S. Parmar; S. Singh; P. M. Boll
π
Article
π
1988
π
John Wiley and Sons
π
English
β 286 KB
substituted 4-methylcoumarins (4-methyl-2H-1 -benzopyran-2-ones) have been recorded. The effects of an alkyl side-chain at C-3 on the chemical shift values and that of a methoxy or an acetoxy group