| abstract |
Antibiotic guanidylfungin derivatives represented by formula (I), and acid addition salts thereof:n whereinn X 1 representsn X 2 representsn X 3 representsn R, represents H or CH 3 ; R 2 and R 3 are the same or different selected from H and alkyl and alkenyl groups of up to 6 carbon atoms; R 4 is an alkyl or alkenyl group of up to 6 carbon atoms and R 5 and R 6 are one ether bond, or else R 4 is H, R s is H, and R 6 is OH; and R 7 represents H or an alkyl or alkenyl group of up to 6 carbon atoms. |