60870-21-5 Aminoglycoside 66-40C beta-L-Arabinopyranoside, 2,7,14,19-tetraamino-2,3,4,4a,7,8,12a,13,14,15,16,16a,18,19,20,24a-hexadecahydro-4,16-dihydroxy-6,10:18,22-diepoxy-1H,6H-dibenzo(b,l)(1,11,4,14)dioxadiazacycloeicosine-3,15-diylbis(3-deoxy-4-C-methyl-3-(methylamino)-, (2R-(2R*,3S*,4R*,4aR*,6S*,7R*,12aS*,14R*,15S*,16R*,16aR*,18S*,19R*,24aS*))-