.alpha.-L-Arabinofuranoside, (3.beta.,4.beta., 5.alpha.,6.alpha.,15.beta.,24S)-3,4,6,8,15-pentahydroxycholestan-24-yl 2-O-(2,4-di-O-methyl-.beta.-D-xylopyranosyl)- 102046-49-1 AIDS-168489 AIDS168489 Halityloside D