279.1727 ((M+H)–4CH3COOH–C9H8O2–CH2CO)+, 261.1608 ((M+H)–5CH3COOH–C9H8O2)+. 13 2-Deacetoxy-7,9- dideacetyltaxinine J. 549.2824 ((M+H)–H2O)+, ...
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