Phenanthrenoids are chemical compounds formed with a phenanthrene backbone. Ravatite is a natural mineral consisting of phenanthrene. Other authors consider PAHs to start with the tricyclic species phenanthrene and anthracene. E-liquid were found to contain low levels of anthracene, phenanthrene, 1-methyl phenanthrene and pyren. It is the product of the microbial action on phenanthrene. It is notable for being an aromatic hydrocarbon-degrading bacteria (including naphthalene, phenanthrene, anthracene and toluene). Examples are naphthalene, anthracene, and phenanthrene. Nalbuphine is a semisynthetic mixed agonist/antagonist opioid modulator of the phenanthrene or morphinan series. Further loss of hydrogen gives "fused" aromatic hydrocarbons, such as naphthalene, anthracene, phenanthrene, and pyrene. It has been prepared by oxidation of phenanthrene with chromic acid. Cirrhopetalanthrin is a dimeric phenanthrene derivative from "Cirrhopetalum maculosum". Some of these amphiphiles are phenyl, naphthalene, phenanthrene, pyrene and porphyrin systems. Both phenanthrene and picene are called phenanthrene-edge-type polycyclic aromatic hydrocarbon.