methyl N-[(2S)-1-[2-[[4-[(3S)-3,4-dihydrothiophen-3-yl]phenyl]methyl]-2-[3-[(3Z,8S,11R)-11-oxidanyl-7,10-bis(oxidanylidene)-8-propan-2-yl-6,9-diazabicyclo[11.2.2]heptadeca-1(16),3,13(17),14-tetraen-11-yl]propyl]hydrazinyl]-3,3-dimethyl-1-oxidanyliden