(1S,4R,5R,8R,12R,13S)-1,5-dimethyl-9-methylene-11,14,15,16-t etraoxatetracyclo[10.3.1.04,13.08,13]hexadec-10-yl]oxy}-3-he xenyl)oxy]-1,5,-dimethyl-9-methylene-11,14,15,16-tetraoxatet racyclo[10.3.1.04,13.08,13]hexadecane NSC724784