2255-50-7

Haplophyllum robustum Bge. yields this alkaloid which forms colourless crystals from EtOH. It forms a series of crystalline salts and derivatives including the hydrochloride, m.p. 199-200°C; picrate, m.p. I 79-180°C; acetyl derivative, m.p.174-5°C; methyl derivative, m.p. 140-2°C and the tetrahydrG compound with m.p.201-2°C.

Robustine, a furoquinoline alkaloid, from Dictamnus albus, exhibits inhibitory potency against human phosphodiesterase 5 (hPDE5A) in vitro[1].

ChEBI: A quinoline alkaloid that is furo[2,3-b]quinoline substituted by a methoxy and a hydroxy group at positions 4 and 8 respectively.

PDE5A

4°C, protect from light

Fakhritdinova, Sidyakin, Yunusov,Khim. Prir.Soedin., 1, 107 (1965)
Faizutdinova, Yunusov, ibid, 3, 260 (1967)
Narasimhan, Paradkar, Alurkar, Tetrahedron, 27,1351 (1971)