Naphth[2,3-d]isoxazole-4,5(4aH,8H)-dione, 9-(dimethylamino)-4a-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-8a,9-dihydro -3-(phenylmethoxy)-, (4aS,8aS,9S)- [ 852821-06-8 ]