Tetrahydrofuran
[(2R,3S,5R)-2-[2-[(2S,3S,5R)-3-[5-[(6-chloro-2-methoxy-acridin-9-yl)amino]pentyl]-3-hydroxy-2-[[(2R,3S,5R)-3-hydroxy-5-(5-methyl-2,4-dioxo-pyrimidin-1-yl)tetrahydrofuran-2-yl]methyl]-5-(5-methyl-2,4-dioxo-pyrimidin-1-yl)tetrahydrofuran-2-yl]-3-[(2R,3S,5R)
S-{(9R)-17-[(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-4-hydroxy-3-(phosphonooxy)tetrahydrofuran-2-yl]-9,13,15-trihydroxy-10,10-dimethyl-13,15-dioxido-4,8-dioxo-12,14,16-trioxa-3,7-diaza-13,15-diphosphaheptadec-1-yl} 3-hydroxyhexadecanethioate (non-preferred