Question: It;s too hard to solve it. Please help me sir The methanol extract of the sponge Haliclona vansoesti is toxic to brine shrimp. The extract

It;s too hard to solve it. Please help me sir

The methanol extract of the sponge Haliclona vansoesti is toxic to brine shrimp. The extract was chromatographed and the main component isolated. The compound was determined to have the two-dimensional structure shown (R = H) after analysis of the IR and 1-D NMR data. The compound was converted to the triacetate (R = Ac) followed by reaction of a small amount (0.3 mg) of the triacetate with dimethyl disulfide and iodine. GC-MS analysis of the resulting adduct showed a molecular ion at m'z = 463 and fragment ions at m'z = 145 and 318. Determine the exact position of the double bond in this natural product = OR OR NHR nm = 8

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