1971 年 91 巻 10 号 p. 1124-1126
A new compound (I), mp 155-158°, C12H12O3, reported as compound (III) in the preceding paper, was elucidated as 2, 2-dimethyl-2H-1-benzopyran-6-carboxylic acid on the basis of spectrometric data of I and its derivatives. The structure of I was also confirmed by synthesis.