Dendrobium nobile houses a variety of chemical compounds in it. Some of them are dendrobine, moscatilin, gigantol etc. While I am searching for HPLC standards for dendrobine, I am getting these two links in sigma-aldrich website:
http://www.sigmaaldrich.com/catalog/papers/18052323
http://www.sigmaaldrich.com/catalog/papers/17253844
These are the HPLC standards for HPLC?