Those are MCT's for SAL.

Depending on what airline you arrive/ depart, and if you connection is (I)nternational or (D)omestic the MCT will change per airport.

So if you arrive on UA via an I flight, and depart on UA to another I flight your MCT is 1.00 hours per the chart.

Again, per your profile I am just assuming UA, also because it is an MR I assume it is an international to international connection. If you could give more information that would help.