.beta.-L-Glucopyranosylamine, 4,6-dideoxy-4-[[[(14-methyl-1-oxopentadecyl)amino]acetyl]amino]-N-1H-purin-6-yl- 4,6-DIDEOXY-4-[[[(14-METHYL-1-OXOPENTADECYL)AMINO]ACETYL]AMINO]-N-1H-PURIN-6-YL-.BETA.-L-GLUCOPYRANOSYLAMINE 67642-36-8 NSC268251