47 psi hydrogen for 1 5 hours the mixture was filtered through celite eluting with water the filtrate was washed wih 30 ml diethylether and concentrated under vacuum to a volume of 2 ml reverse phase prep tlc chromatography 10 ethanol in water allowed isolation of a band at r f 3 the silica was eluted with 20 ml acetonitrile water 4 1 concentration and lyophylization gave 0 009 gm p as an off white powder 1 h nmr d 2 o u03b4 4 45 4 30 2h m 3 84 2h br s 3 60 1h m 3 22 2h m 3 12 3h s 2 74 3h s 1 32 3h d j 7 uv u03bb max 289 nm one such unit dosage form is prepared by mixing 120 mg of the compound of example 1 compound a with 20 mg of lactose and 5 mg of magnesium stearate and placing the 145 mg mixture into a no 3 gelatin capsule similarly by employing more of the active ingredient and less lactose other dosage forms can be put up in no 3 gelatin capsules and should it be necessary to make more than 145 mg of ingredients together larger capsules such as compressed tablets and pills can be prepared the following examples are illustrative of the preparation of.