.beta.-D-Glucopyranoside, 2-(4-hydroxy-3-methoxyphenyl)ethyl 3-O-(6-deoxy-.alpha.-L-mannopyranosyl)-4-O-[(2E)-3-(3,4-dihydroxyphenyl)-1-oxo-2-propenyl]- AIDS-112623 AIDS112623 Jionoside D