9-Isopropyl-2,2,5-trimethyl-2,5,6,7-tetrahydrophenaleno[1,9-bc]furan-8-yl triisopropylsilyl ether AIDS-150195 AIDS150195 NSC686515 Triisopropyl((9-isopropyl-2,2,5-trimethyl-2,5,6,7-tetrahydrophenaleno[1,9-bc]furan-8-yl)oxy)silane