“…The data was in agreement with the literature. [94,102,147] papaverinol (17, C 20 H 21 NO 5 , white solid, 1 mg, 1 %): 1 H NMR (300 MHz, CDCl 3 ): δ = 8.42 (1H, d, J = 5.7 Hz, 3-H), 7.56 (1H, d, J = 5.7 Hz, 4-H), 7.16 (1H, s, 8-H), 7.09 (1H, s, 5-H), 6.93 (1H, dd, J = 8.1, 1.8 Hz, 6'-H), 6.86 (1H, d, J = 1.8 Hz, 2'-H), 6.79 (1H, d, J = 8.1 Hz, 5'-H), 6.20 (1H, s, 10-H), 4.00 (3H, s), 3.83 (3H, s), 3.82 (3H, s), 3.77 (3H, s). The data was in agreement with the literature.…”