400 MHz in CDCl3
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1H NMR 399.65 MHz C12 H8 O2 0.013 g : 0.5 ml CDCl3 1H,3H-naphtho(1,8-cd)pyran-1-one 
Assign. Shift(ppm)
A 8.396 B 8.112 C 7.854 D 7.657 E 7.559 F 7.376 G 5.831 ASSIGNED BY H-H COSY
Hz ppm Int.3359.62 8.407 288 3358.52 8.404 287 3352.42 8.389 305 3351.32 8.386 300 3246.83 8.125 284 3245.85 8.122 275 3238.53 8.104 308 3237.55 8.101 291 3143.92 7.867 231 3143.19 7.865 228 3135.62 7.846 268 3134.89 7.845 261 3067.63 7.676 307 3060.42 7.658 335 3059.33 7.656 313 3052.12 7.637 271 3028.93 7.579 243 3021.73 7.561 317 3020.63 7.559 241 3013.55 7.541 256 2953.00 7.389 118 2951.78 7.386 264 2950.56 7.383 256 2949.34 7.380 110 2945.92 7.372 104 2944.70 7.369 223 2943.48 7.366 213 2942.26 7.363 89 2330.32 5.831 1000
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