4-{[3-(1,3-Dimethylpent-1-enyl)(2S,8S,6R)-4,6,8-trimethylbicyclo[4.4.0]dec-4-en-2-yl]carbonyl}-2-aza-1-[(4-hydroxyphenyl)methyl]-7,7-dimethyl-6,8-dioxabicyclo[3.3.0]octan-3-one AIDS-097036 AIDS097036 Talaroconvolutin D Tetramic acid derivative