1. The structure of the acidic compound, isolated from the partial metha-nolysis products of agar in the previous work, has been investigated.2. Methylation data have indicated that the structure of the compound is 4-O-4′, 6′-O-1″-carboxyethylidene-β-d-galactopyranosyl-3,6-anhydro-l-galactose dimethyl-acetal, the β-linkage being suggested on the basis of the optical rotatory behavior.3. The structure assigned is also supported by the result of partial hydrolysis and periodate oxidation of the compound.4. No information has been obtained as to the configuration of the carbon atom C1 of the ethylidene group in the molecule.
1. 在之前的研究中,从
琼脂的部分
甲醇解离产物中分离得到的酸性化合物的结构已经被研究。
2. 甲基化数据表明该化合物的结构为4-O-4′, 6′-O-1″-羧
乙烯基-β-d-半
乳糖吡喃糖-3,6-脱
水-l-半
乳糖二甲基
缩醛,β-连接
基因据光学旋转行为推测。
3. 所赋予的结构也得到了该化合物的部分
水解和期
亚硫酸盐氧化的结果支持。
4. 目前尚未获得关于分子中
乙烯基团C1碳原子构型的信息。