(REUTERS) — Tightening international sanctions against Iran look set to shrink its economy, push up inflation and further erode its currency, but they may fail to deliver a knock-out blow that forces Tehran to compromise on its nuclear ambitions.

Few areas of Iran’s economy now remain untouched by the sanctions. Because of payments difficulties, Iranian ships have in recent days stopped loading imports of Ukrainian grain. The United Arab Emirates has told its banks to stop financing Iran’s trade with Dubai. Iranians are finding it more difficult to obtain hard currency to travel abroad.

But the history of sanctions against other countries, and the strengths of Iran’s diverse and relatively self-reliant economy, suggest that as long as Tehran can find buyers for a large proportion of its oil, it will be able to limp along.

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