| abstract |
Compounds of formula In whereinn R represents hydrogen, C 14-18 -alkyl or CH z OR 2 CH 2 CH 2 OR 2 , wherein R 2 represents C 14-18 alkyl each R, represents independently C 1-3 alkyl m is l or 2 n is an integer from 2 to 8 and R 4 and R 5 together with the adjacent carbon atom represent wherein R 3 represents alkyl, alkenyl, alkynyl, alkoxy, alkenoxy or alkynoxy each containing 12 to 24 carbon atoms whereby when R 4 and R 5 together with the adjacent carbon represent (i) ring e) R is H and (ii) other than ring e) R is other than H which exhibit pharmaceutical in particular anti-tumor activity. |