Patent ID: 7355063

Claim:
A compound represented by the following formula (1): (wherein R 1 is a hydrogen atom, a lower alkyl group, or a protective group of a phenolic hydroxyl group, R 2 is a hydrogen atom or a protective group of a phenolic hydroxyl group, A is an alkylene group having 1 to 4 carbon atoms, B is an alkylene group having 1 to 12 carbon atoms, R 3 is â€”COOR 4 (wherein R 4 is a protective group of a carboxyl group), a carboxyl group, or â€”CH 2 OH, and Z is â€”COâ€”CHâ•CHâ€”, â€”CHOHâ€”CHâ•CHâ€”, â€”CHOHâ€”1,2-epoxy-, â€”CHOHâ€”CH 2 CH 2 â€”, â€”CHOHâ€”CH 2 CHOHâ€”, â€”COâ€”CH 2 CHOR 5 â€”, â€”CHOHâ€”CH 2 CHOR 5 â€”, a ketal derivative of â€”COâ€”CHâ•CHâ€”, or a ketal derivative of â€”COâ€”CH 2 CH 2 â€” and R 5 is a lower alkyl group when R 3 is a â€”COOR 4 group, Z is â€”COâ€”CHâ•CHâ€”, â€”CHOHâ€”CHâ•CHâ€”, â€”CHOHâ€”1,2-epoxy-, â€”CHOHâ€”CH 2 CH 2 â€”, â€”CHOHâ€”CH 2 CHOHâ€”, â€”COâ€”CH 2 CHOR 5 â€”, â€”CHOHâ€”CH 2 CHOR 5 â€”, a ketal derivative of â€”COâ€”CHâ•CHâ€”, or a ketal derivative of â€”COâ€”CH 2 CH 2 â€” and R 5 is a lower alkyl group when R 3 is a carboxyl group, or Z is â€”CHOHâ€”CHâ•CHâ€”, â€”CHOHâ€”1,2-epoxy-, â€”CHOHâ€”CH 2 CHOHâ€”,â€”COâ€”CH 2 CHOR 5 â€”, â€”CHOHâ€”CH 2 CHOR 5 â€”, a ketal derivative of â€”COâ€”CHâ•CHâ€”, or a ketal derivative of â€”COâ€”CH 2 CH 2 â€” and R 5 is a lower alkyl group when R 3 is a â€”CH 2 OH).