1H,8H-3a,9b-Epoxynaphth[1,8-bc]oxireno[2,3]naphtho[1,8-fg][1,5]dioxocin-8-one, 2,3,8a,9a-tetrahydro-1,1,7-trihydroxy-3-methoxy-, (3R)- AIDS-213321 AIDS213321