作者: Akio Nishihara , Kazumi Aoki , Toshio Sakurai , Hidekatsu Katoh , Makoto Yoto
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摘要: A compound having the following general formula (I); ##STR1## wherein R1 and R2 stand for a hydrocarbyl group from 1 to 24 carbon atoms, x is number of 0.5 - 2.3, useful as an additive lubricants.