label: 2-oxo-3-[(8S)-epoxy-(2E,6E)-farnesyl]-6-(pyridin-3-yl)-2H-pyran-4-olate + H(+) => deacetylpyripyropene E
label_lc: 2-oxo-3-[(8s)-epoxy-(2e,6e)-farnesyl]-6-(pyridin-3-yl)-2h-pyran-4-olate + h(+) => deacetylpyripyropene e