“However, in … of NG‐nitro‐L‐arginine (3 × 10−5 M, a nitric oxide synthase inhibitor), Ro 68070 (10−4 M, a thromboxane synthetase inhibitor‐thromboxane …/prostaglandin H2 receptor antagonist) or ICI 192605 (10−5 M, a thromboxane A2 receptor antagonist) the relaxant response to L‐carnitine was … inhibited.”