(2S,11aS)-2-hydroxy-2-((R)-1-hydroxyethyl)-10-(methoxymethyl)-2,3-dihydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepine-5,11(10H,11aH)-dione

(R)-1-((2S,11aS)-2-hydroxy-10-(methoxymethyl)-5,11-dioxo-2,3,5,10,11,11a-hexahydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepin-2-yl)ethyl methanesulfonate