| 摘要 |
<p>A shingoglycolipid represented by general formula (I), which is efficiacious even when administered in a small amount, is reduced in side effects, and has antitumor and immunopotentiating activities, wherein X and Y represent respectively integers of 10 to 24 and 9 to 13; R1 represents hexosyl, pentosyl, deoxyhexosyl, aminohexosyl, N-acetyl aminohexosyl, a halogenated derivative of any of them, or a sialic acid residue; R2 represents H or OR2', wherein R2' represents H, galactosyl or glucosyl; R3 represents H or OR3', wherein R3' represents H, galactosyl or glucosyl; R4 represents galactosyl or H; R5 represents methyl or isopropyl; and R6 and R7 represent each independently H or alternatively they are combined together to represent a double bond between the carbon atoms to which they are respectively bonded; provided that the case where R1 represents alpha -galactosyl and R4 represents H is excepted. <CHEM></p> |
