DERIVADOS DE ESTILBENO

Compounds of the general formula wherein n is 1 or 2 and, when n is 1, R and R are hydrogen, alkoxy or halogen, or, when n is 2, R is hydrogen, alkoxy or halogen and R is hydrogen; R , R , R and R are hydrogen or alkyl; R is hydrogen, methyl or ethyl; R and R are hydrogen, alkyl or halogen, and R10 is -(CH=CR )m, in which m is zero or 1 and R is or 2-oxazolinyl, or, when m is 1, also is hydrogen; R is hydrogen or alkyl; R is hydrogen, alkyl or -N(R , R ) or -OR ; R is hydrogen, alkyl or alkanoyl; R is hydrogen, alkyl or -OR or -(CH2)pN(R , R ); R is hydrogen, alkyl, hydroxy alkyl or optionally, substituted aryl, or aralkyl; R and R are hydrogen or alkyl or R and R together with the nitrogen atom form a heterocyclic group; R is hydrogen or alkyl and p is zero, 1, 2 or 3; ketals and salts thereof are useful for the treatment of neoplasms, dermatological conditions and rheumatic illnesses.