... where R = H, halogen, alkyl, n = from 1 to 16; ... When such a solution is poured into water acidified by hydrochloric acid, containing small amounts of the same organic acid, extremely pure crystalline ... ooc-o OH OH I '\=/ I I () , ~-eoo-~-eo-~ ~ 1_ ooe _~ rearrange- "=/ "J "=/ "d ment ...