FIG 2.
Mass spectra of products from spiro compounds and putative structural identifications. (A) Spiro[2.4]hept-6-ene-4,5-diol; (B) spiro[2.4]hept-6-ene-4-ol-5-one; (C) spiro[cyclopropane-1,1′-[1H]inden]-3′(2′H)-one; (D) 1-methylinden-1-ol.
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