| abstract |
A compound represented by formula (I), wherein R is a (C1-C10)alkyl, e.g., CH3 or an arylmethyl group, e.g. benzyl and N-oxide stereochemical isomers thereof or a pharmaceutically acceptable salt thereof as well as pharmaceutical compositions containing a compound of formula (I) and a method of treating tumors or psoriasis using a compound of formula (I) or a pharmaceutical composition thereof are disclosed. |