The U.V. and I.R. absorption spectra of yangonine (IIa), pseudoyangonine (IIIa) and related compounds have been recorded. The absorption of the compounds of type II proves for their structure as 2H-pyran-2-one, and the absorption of the compounds of type III—their structure as 4H-pyran-4-one.
记录了仰光
氨酸(IIa),假仰光
氨酸(IIIa)和相关化合物的UV和IR吸收光谱。II型化合物的吸收证明其结构为
2H-吡喃-2-酮,III型化合物的吸收证明其结构为4H-
吡喃-4-酮。