(1S,2S,3R,4R)-3-[(1S)-1-({[(4aS,4S,5S,6S,7aR)-1-[amino(azanylidene)methyl]-5-hydroxy-2-oxo-4-(pent-3-yl)octahydro-1H-cyclopenta[1,2-d]pyrimidin-6-yl]carbonyl}amino)-2-ethylbutyl]-4-{[amino(azanylidene)methyl]amino}-2-hydroxycyclopentane-1-carboxylic acid