| abstract |
A pharmaceutical composition comprising an amount of a polypeptide of the formula: ##STR1## wherein R 1 is hydrogen or an acyl group, R 2 is hydroxy or an acyloxy group, R 3 is hydrogen, hydroxy or hydroxysulfonyloxy, R 4 is hydrogen or carbamoyl, and R 5 and R 6 are each hydrogen or hydroxy, with the proviso that (i) R 2 is acyloxy when R 3 is hydrogen, and (ii) R 5 is hydrogen when R 6 is hydrogen, or a pharmaceutically acceptable salt thereof, is useful in the prevention or treatment of Pneumocystis carinii infection. |