| 摘要 |
Compounds represented by general formula (I) or pharmaceutically acceptable salts thereof, wherein R represents C2-4 alkyl having 1 to 3 hydroxyl groups; R<1> and R<2> represent each hydrogen or OH; and G represents pentose or hexose, provided that R<1> and R<2> do not represent hydrogen at the same time, and excluding the case where R<1> is OH at the 1-position and R<2> is OH at the 11-position when R is CH(CH2OH)2, and another case where R<1> is OH at the 2-position and R<2> is OH at the 10-position when R is CH(CH2OH)2. Because of having an excellent antitumor effect, the compounds are useful as an antitumor agent in the field of medicines. |
