【化学】酸酐，循环【化学】去水，脱水，周期的，循环的

anhydrides

anhydrides of acyclic, unsaturated anhydrides

diazo anhydrides

monocarboxylic acid anhydrides, unsaturated

SULFONIC acids, esters, halides, anhydrides or amides

anhydrides of carbamic acid

dicarboxylic acid anhydrides, unsaturated

separator (settler) anhydrides, cyclic