Eleven atisine-type diterpene alkaloids, including five new ones 19-O-deeth
ylspiramine N (1), 15-deacetylspiramine S (2), spiramine Z-2 (3), spiramine
Z-3(4), deacetylspiramine F(5), and six known ones, spiramines A, B, C, D,
F(6), H were isolated from the air dried Spiraea japonica var. ovalifolia.