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Abstract

A trehalose derivative of the formula: ##STR1## wherein one, two, three or four of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are independently selected from the group consisting of C.sub.1-40 aliphatic acyl groups and all the rest of them are hydrogen atoms, with the proviso that: a) when one of them is C.sub.1-40 aliphatic acyl group, then it is not 2-palmitoyl or 6-aliphatic acyl, b) when two of them are C.sub.1-40 aliphatic acyl groups, then they are not located at corresponding positions with each other, c) when three of them are C.sub.1-40 aliphatic acyl groups, then they are not 2,3,2'-tripalmitoyl, and d) when four of them are C.sub.1-40 aliphatic acyl groups, then they are not located at corresponding positions with each other or at 2,3,4,2'- or 2,3,6,2'-positions. The compounds of the above formula have anti-tumor activity.

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