Dcalycinumines A—E, Alkaloids with Cytotoxic Activities of Nasopharyngeal Carcinoma Cells from Daphniphyllum calycinum

Optical rotation values Dcalycinumine B: Original: [α] 25 D +12.1 (c 0.2, CH 3 OH).Corrected: [α] 25 D -10.8 (c 0.2, CH 3 OH).Dcalycinumine C: Original: [α] 25 D +8.3 (c 0.2, CH 3 OH).Corrected: [α] 25 D -22.3 (c 0.2, CH 3 OH).2. NMR assignments for Dcalycinumine B (2) in Table 1 Position 3: Original: δ H = 3.16.