| abstract |
(57) [Summary] (Correction) [Constitution] The following formula I [In the formula, R 1 and R 2 R 3 are the same or different, and the substituents CH 3 —CO— (CH 2 ) m — and (C 1 -C 6) - is selected from the group consisting of alkyl, one of the group of substituents is CH 3 -CO- (CH 2) m , (C 1 -C 6 ) -alkyl is a straight chain or branched chain] compound of Rhodotorulabra DSM 54 S- (ω-1) consisting of incubating with 36 -A method for the enantioselective preparation of hydroxyalkylxanthines. [Effect] It has an effect of increasing cerebral blood flow. |