A new compound trans-3-methoxy-4,5-methylene-dioxycinnamaldehyde (1) h
as been isolated from the aerial parts of Cassia grandis (Caesalpiniac
eae) along with the known compounds aloe emodin, centaureidin, catechi
n, myristicin, 2,4-dihydroxybenzaldehyde, 3,4,5-trimethoxybenzaldehyde
, 2,4,6-trimethoxybenzaldehyde, and beta-sitosterol. The structure of
1 was determined by spectral methods.