ADDITIONS AND CORRECTIONS
2011, Volume 74
Hankui Wu, Frank Fronczek, Daneel Ferreira, Charles L. Burandt, Jr, and Jordan Zjawiony*: Labdane Diterpenoids from Leonurus sibiricus”.
Page 833: The last sentence of the second paragraph should be: Additional NOE interactions between Me-17 and H-14, and between the C-16 and C-1 methylene protons indicated the 13S-configuration.
Page 833, Table 2: For compound 2 the multiplicity of C-4 at δC 37.8 should be changed to C. Similarly, the multiplicity of C-16 in compounds 2, 3 and 5/6 should be changed to CH2.