| abstract |
Polyprenyl derivatives having the formula <IMAGE> [wherein A and B individually represent a group of the formula -CH2OR1 (wherein R1 is hydrogen atom, an alkyl group having an intervening hetero atom in the carbon chain, carboxyl group on its salt or an aliphatic acyl group optionally having an intervening hetero atom in the carbon chain, an aromatic acyl group, a heterocyclic acyl group, an araliphatic acyl group, a heterocyclic aliphatic acyl group or a radical of an inorganic acid or its salt) or where one of A and B represents the group -CH2OR1, the other represents a group of the formula -COOR2 (wherein R2 represents hydrogen atom, a metal atom capable of forming a salt, an organic base or an alkyl group), a group of the formula <IMAGE> or a group of the formula <IMAGE> (wherein R3 and R4 may be the same or different and each represents hydrogen atom, an alkyl group optionally having a heterocyclic substituent, an aryl group or an aralkyl group or R3 and R4 may jointly form a ring optionally containing other hetero ring atom) and n is an integer of 0 to 4 inclusive, provided that when both A and B are the group -CH2OR1, either of the R1 represents an alkyl group having an intervening hetero atom, carboxyl group or its salt, an aliphatic acyl group having an intervening hetero atom in the carbon chain, a heterocyclic acyl group, a heterocyclic aliphatic acyl group or a radical of an inorganic acid or its salt]. |