Patent ID: 8163939

Claim:
An ascorbic acid derivative represented by the following general formula (I): wherein, R 1 represents H, alkyl group having 1 to 22 carbon atoms, alkenyl group having 2 to 22 carbon atoms, benzyl group, R 3 —O—CH 2 —CH(OH)—CH 2 —, R 4 —O—CH 2 —CH(CH 2 OH)—, R 5 —CH(CH 2 OH)—, R 6 —CH(OH)—CH 2 — or hydroxycyclohexyl group, R 2 represents H, alkyl group having 1 to 22 carbon atoms, alkenyl group having 2 to 22 carbon atoms, benzyl group, R 7 —O—CH 2 —CH(OH)—CH 2 —, R 8 —O—CH 2 —CH(CH 2 OH)—, R 9 —CH(CH 2 OH)—, R 10 —CH(OH)—CH 2 — or hydroxycyclohexyl group, R 3 and R 4 represent H, alkyl group having 1 to 22 carbon atoms, alkenyl group having 2 to 22 carbon atoms or phenyl group, R 5 and R 6 represent H, alkyl group having 1 to 20 carbon atoms, alkenyl group having 2 to 20 carbon atoms or phenyl group, R 7 and R 8 represent H, alkyl group having 1 to 22 carbon atoms, alkenyl group having 2 to 22 carbon atoms or phenyl group, R 9 and R 10 represent H, alkyl group having 1 to 20 carbon atoms, alkenyl group having 2 to 20 carbon atoms or phenyl group, provided that when R 1 represents H, alkyl group having 1 to 22 carbon atoms, alkenyl group having 2 to 22 carbon atoms or benzyl group, R 2 does not represents any of H, alkyl group having 1 to 22 carbon atoms, alkenyl group having 2 to 22 carbon atoms and benzyl group, or salt thereof.