Oklahoma City has asked the Heat for multiple young, valuable assets in trade conversations involving guard Russell Westbrook, and Miami — at least to this point — has refused, according to a league source briefed on the discussions by one of the teams.

OKC has asked the Heat to include impressive rookie guard Tyler Herro in the proposed trade, but the Heat has been reluctant to do that. Because Herro signed with the Heat on Wednesday, he cannot be included in any trade for 30 days, but that isn’t viewed as an obstacle.

At another point in the discussions this week, the Thunder asked the Heat to include two among Herro, Bam Adebayo and Justise Winslow, according to a source in touch with one of the two teams. The Heat also is opposed to including Adebayo, whom coach Erik Spoelstra ranked among the best centers in the league in the final months of last season.

Though the Heat very much would like to add Westbrook, OKC’s demands have resulted in a stalemate in conversations as of Wednesday evening.

Whether the Heat would be willing to include Winslow remains to be seen. Though the Heat is pleased with Winslow and views him as a core piece, his value might be diminished somewhat with Westbrook here because Winslow does some of his best work while playing on the ball — an opportunity that would come less frequently with Westbrook on the Heat.

One reason OKC wants valuable young assets from the Heat stems from the fact that Miami couldn’t give the Thunder any draft picks because OKC — through the Clippers — owns Miami’s first-round picks in 2021 (unprotected) and 2023 (protected).

ESPN front-office expert Bobby Marks, during a conversation at a summer league game this week, noted that Miami isn’t even permitted to trade another first-round pick because protections on the 2023 pick extend into 2026, and teams cannot trade first-round picks that extend beyond seven years.