Then,
they were assigned to be identical to those of alschomine, which was
also supported by NOE correlation of δH 4.39 (H-3)/3.35 (H-15) in the
ROESY spectrum. Furthermore, NOE correlation of δH 1.79 (H3-18)/δH
3.35 (H-15) supported an E-type of double bond C-19/20 (See Fig. 3). So
compound 2 was elucidated to be 5-hydroxy-19, 20-E-alschomine