Oblon, Spivak, McClelland, Maier & Neustadt
Process for producing vitamin A or its carboxylic acid esters
 The invention provides a process for producing vitamin A or its carboxylic acid ester by treating inexpensive and readily available industrial starting materials with potassium hydroxide which is widely employed industrially and is inexpensive. 
Kuraray Company Ltd.
C C C C
C07C C07C C07C C07C
inventional additional inventional inventional
Shigeaki Toshiki Takashi
Suzuki Mori Onishi