55304-01-3 AIDS-130743 AIDS130743 NSC611360 Prepacifennol epoxide {Spiro[cyclohexane-1,5'-[3,} {8]dioxatricyclo[5.1.0.02,4]} octan\]-2-ol, 5,7'-dibromo-4-chloro-4, 4',6',6'-tetramethyl-, {[1'R-[1'.alpha.,2'.beta.,4'.beta.,} 5'.alpha. (2S*,4S*,5S*), 7'.alpha.\]\]-