PA-132

arenaemycin E

Pentalenolactone

Antibiotic PA-132

(1R,9aS)-4,4aα,6aβ,7-Tetrahydro-7α,8-dimethyl-2-oxospiro[pentaleno[1,6a-c]pyran-1(2H),2'-oxirane]-5-carboxylic acid

(2R,9'aS)-4',4'aα,6'aβ,7'-Tetrahydro-7'α,8'-dimethyl-2'-oxospiro[oxirane-2,1'(2'H)-pentaleno[1,6a-c]pyran]-5'-carboxylic acid