fumigacin

HELVOLIC ACID FROM CEPHALOSPORIUM*CAERULENS

6-beta,8-alpha,9-beta,13-alpha,14-beta,16-beta,17-beta)--alph

17(20),24-trien-21-oicacid,6,16-bis(acetyloxy)-3,7-dioxo-29-nordammara-(4

(8α,9β,13α,14β,17Z)-6β,16β-Diacetoxy-3,7-dioxo-29-nor-5α-dammara-1,17(20),24-trien-21-oic acid

(8α,9β,13α,14β,17Z)-6β,16β-Bis(acetyloxy)-3,7-dioxo-29-nordammara-1,17(20),24-trien-21-oic acid