This Additions and Corrections document provides corrections for two articles from 2000, Volume 63: For Kenneth E. Milligan et al.'s article "Two New Malyngamides from a Madagascan Lyngbya majuscula", reference 1 under References and Notes on Page 968 should read: Ling-Hua, A.; Longley, R. E.; Koehn, F. E. Life Sci. 1997, 60, 751-762. For Dale R. Gardner et al.'s article "Three New Toxic Norditerpenoid Alkaloids from the Low Larkspur Delphinium nuttallianum", the structures of compounds 1-7 on Page 1127, which were very faint at publication, are reproduced for clarity.