Abstract: There are described compounds of formula I, ##STR1## in which Ra is hydrogen, alkyl, alkenyl or phenyl, R.sub.3, R.sub.5, R.sub.7 and R.sub.8, which may be the same or different, are each hydrogen, alkyl, alkoxy, halogen, hydroxy, alkenyl or phenyl,Rx is hydrogen or alkyl,Ry and Rz are both hydrogen, or together represent a carbonyl oxygen atom,Rb and Rc are both hydrogen or together represent a carbon-carbon bond,Provided that when Rx is hydrogen, Ry and Rz together represent a carbonyl oxygen atom and R.sub.5, R.sub.7 and R.sub.8 are all hydrogen then Ra is other than methyl or phenyl,And pharmaceutically acceptable derivatives thereof.There are also described methods for making the compounds and pharmaceutical, e.g. anti-inflammatory, compositions containing the compounds.