2-Oxa-4,6,11-triazadodecan-12-oic acid,10-[[[4-[[[9-(diethylamino)-5H-benzo[a]phenoxazin-5-ylidene]amino]carbonyl]phenyl]amino]carbonyl]-5-imino-3-oxo-1-phenyl-6-[(phenylmethoxy)carbonyl]-, phenylmethyl ester, (10S)-
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