Refinement of the crystal structure of sinoacutine, C19H21NO4

Crystal structure of N-formylanonaine, C18H15NO3, at 103 K

“…In our previous study for bioactive compounds from Sinomenium acutum,t wo new morphinane alkaloid dimers [6] and anew skeleton alkaloid named sinoracutine [7] were isolated from the roots of the plant, a new hasubanane-type alkaloid named 8-demethoxyrunanine [8] was obtained from the mother benzene liquor. We also reported the crystal structures of several alkaloid from the mother liquor [9][10][11][12][13]. N-formylanonaine, the very common alkaloids with Nformylaporphine skeletons was discovered in families of Annonaceae [14][15][16], Menispermaceae [17,18], and Magnoliaceae [19].…”

Crystal structure of 11-hydroxy-10-methoxy-3-methyl-1,2,3,3a-tetrahydro-4H-benzo[6,7]indeno[1,7a-b]pyrrol-4-one, C17H17NO3, a (+)-sinoracutine at 93 K

“…Its optical isomer representing anew skeleton alkaloid with the cell-protective effects has been recently isolated from the roots of Sinomenium acutum [6]. In the process of related studies, we have already reported the isolation and crystal structures of cheilanthifoline [7], 8-oxotetrahydropalmatine [8], tetrahydroepiberberine [9], 8-oxocanadine [10], sinoacutine [11] and 8-demethoxyrunanine [12]. The title compound is composed of four rings A, B, C and D.Ring A is ab enzene ring, with an attached hydroxyl at C4 and methoxyl at C3 which are essentially coplanar to A.R ing B adopts half-chair conformation.…”