Disaccharide derivatives represented by the formula (I): ##STR1## wherein R.sup.1 CO-- and R.sup.2 CO-- each represents a residue of a straight chain fatty acid having from 8 to 20 carbon atoms and having a hydroxyl group at the 3-position thereof; R.sup.3 CO-- and R.sup.4 CO-- each represents a residue of a straight chain fatty acid having from 8 to 20 carbon atoms; and m and n each represents an integer of from 8 to 12, and the salts thereof. The compounds exhibit biological activities equal to or higher than those of natural lipid A. Also, the compounds of this invention are very useful as standard reagent for determination of endotoxin in the samples to be tested.
由公式(I)表示的二糖衍
生物:其中R.sup.1 CO-和R.sup.2 CO-分别表示具有8至20个碳原子并在3位具有羟基的直链
脂肪酸残基;R.sup.3 CO-和R.sup.4 CO-分别表示具有8至20个碳原子的直链
脂肪酸残基;m和n分别表示从8到12的整数,以及它们的盐。这些化合物表现出与天然脂
多糖A相等或更高的
生物活性。此外,本发明的化合物在样品中检测内毒素时非常有用作标准试剂。