The fourth seeded Indian pair lost 5-7 4-6 to the brothers from Thailand in the USD 50,000 hard court event.
Jeevan and Ramkumar could convert only one of the three break chances in the opening set and got none in the second.
The Indians split USD 1,800 as prize money and earned 55 ranking points each.
Left-handed Jeevan was playing his fourth doubles final of the season at the Challenger level, having won titles in Karshi (with Enrique Lopez-Perez) in May and Nanjing (with Saketh Myneni) in April.
For Ramkumar, whose focus is singles, it was his first doubles final of the season, having played a couple of semifinals.
The next stop for Jeevan is ATP 250 European Open in Antwerp, where he pairs with Belarus' Andrei Vasilevski.
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