3-{[3-(1,3-Dimethylpent-1-enyl)(2S,8S,6R)-4,6,8-trimethylbicyclo[4.4.0]dec-4-en-2-yl]carbonyl}-4-ethoxy-5-hydroxy-5-[(4-hydroxyphenyl)methyl]pyrrolidin-2-one AIDS-097035 AIDS097035 Talaroconvolutin C Tetramic acid derivative