(6S,2R-(3R,9R,11R)-8S-(1S))-(+)-methyl 5-(N-methyltrifluoroacetamido)-2-(3,9,11-trimethyl-8-(1-methyl-2-oxo-2-(1H-pyrrol-2-yl)ethyl)-1,7-dioxaspiro(5.5)undec-2-yl)methyl-4-benzoxazolecarboxylate

(-)-calcimycin methyl ester

1-(1-tert-butyloxycarbonyl-1-azacyclopenta-2,4-dien-2-yl)-1-propanone

(2R,3R,6S,8S,9R,11R,1'R)-2-(carboxymethyl)-8-(1'-methyl-2'-oxo-2'-(1H-pyrrol-2-yl)ethyl)-3,9,11-trimethyl-1,7-dioxaspiro(5.5)undecane

methyl 3-hydroxy-6-(N-methyltrifluoroacetamido)-anthranilate