abstract |
A compound of the structure <IMAGE> wherein R1 and R2 are each, independently, hydrogen or COCH2-S-CH2CH2-O-CH2-(CH2OCH2)n-CH2-O-CH2CH2-OCH3; and n=8-450; with the proviso that R1 and R2 are not both hydrogen, which is useful as an immunosuppressive, antiinflammatory, antifungal, antiproliferative, and antitumor agent. |