49863-47-0 AIDS-114952 AIDS114952 G418 Geneticin O-2-Amino-2,7-dideoxy-D-glycero-alpha-D-gluco-heptopyranosyl-(1-4)-O-(3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranosyl-(1-6))-D-streptamine