1-Naphthalenecarboxylic acid, 3-methoxy-5-methyl-, 2-((1-(3-(acetyloxy)-4-hydroxy-1-azabicyclo(3.1.0)hex-2-ylidene)-2-((1-(hydroxymethylene)-2-oxopropyl)amino)-2-oxoethyl)amino)-1-(2-methyloxiranyl)-2-oxoethyl ester