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m/z (563.10761) is NOT the Molecular Ion? (II)

(1) Try to adjust the the capillary voltage: increase it a little bit each time.
If the the mass response of [M＋H2O －Ｈ]－ is decrease, the mass response of [M-H]- increase: then the m/z (563.10761) definitely is the molecular Ion.
If No such change happened, then the m/z (563.10761) definitely is NOT the Molecular Ion.

(2) From my view, the possibility of ［Ｍ＋Ｈ２Ｏ－Ｈ］( belongs to Molecular ion) is very low. Under ESI (-) negative mode, the trend of forming
the ［Ｍ＋ＨＣＯＯmore high.
Doubt the H2O have that much acidity for forming the ion peak.

m/z (563.10761) is NOT the Molecular Ion? (I)

What is the capillary voltage?
Did you try to increase a little bit?