Showing structure for (r)-{[(2r,3r,4r)-2-amino-1,4-dihydroxy-3-methyl-4-(pyridin-2-yl)butylidene]amino}[(2s,3r,4s,5s)-3,4-dihydroxy-5-(4-hydroxy-2-oxopyrimidin-1-yl)oxolan-2-yl]acetic acid