The same methyl iodide gave with potassium cyanide, acetonitril, which was hydrolysed to acetic acid; this must be C(Coch) a H b H c H d.
Powis Castle, being of red sandstone, is usually called in Welsh Castell Coch (red castle).
Potassium permanganate oxidizes it to acetylanthranilic acid, [[Hooc(') C 6 H 4 (2)Nh Coch]] 31 while chromic acid oxidizes it to quinaldic acid (quinoline-a-carboxylic acid).
Ty Coch is a large detached self catering farmhouse in a peaceful location close to the foot of Snowdon.
His fantasy castles - Cardiff Castle and Castel Coch - designed by William Burges, sprang from a romantic medievalism.