Where M/Z 425 from? ( II )

Please click the elucidation Scheme for more details:
(Sorry for the confusion in the last post.)

From M/Z (471) to M/Z (425) , maybe belong the loss of Formic Acid (46) .

That is interesting Mass Spectrum, Good luck.

Where M/Z 425 from? ( I )

The molecular weight of your analyte is 548: 1st Mass is 549, 2nd Mass is 489, 3rd Mass are 471, 425.

Here is HUGE challenge for the structural elucidation of your analyte.
From M/Z (471) to M/Z (425) , maybe belong the loss of Acetoxyl M/Z.

But it is NOT right because there are two Acyloxy in your analyte.

Will Update you by Monday Night.