FIGURE 2.

Timing (A) and simulation (B) of the ImpeRfection RobUst Partial Transfer (IRRUPT) polarization transfer pulse sequence, which is based on the B1‐insensitive nuclear enhancement throughpolarization transfer (BINEPT) ¹⁹ and hyperpolarized insensitive nucleus delivers enhancement repeatedly (HINDER) ²² sequences, with τ ₁ + τ ₂ = 0.442/(2 π J_NH ) = 782 µs, τ ₃ + τ ₄ = 1/(2 J_NH ) = 5555 µs, δ = 18.050°. The sequence was simulated with a maximum B₁ amplitude of 2500 Hz for ¹⁵N and 4000 Hz for ¹H