72.8
[]. Assemat G, et al. Isolation and identification of ten new sildenafil derivatives in an alleged herbal supplement for sexual enhancement. J Pharm Biomed Anal. 2020 Nov 30;9:3482.
[2]. Haning H, et al. Imidazo[,-f]triazin-4(3H)-ones, a new class of potent PDE inhibitors. Bioorg Med Chem Lett. 2002 Mar 2;2(6):86-8.
H3-H39-H33
P26-P264-P27-P280-P302+P32-P304+P340-P362-P40-P0