metabolic process
 |__catabolic process______________
 |__hydrocarbon metabolic process__|
                                   hydrocarbon catabolic process  1 rec.
                                    |__alkane catabolic process
                                    |   |__methane catabolic process
                                    |__alkene catabolic process
                                    |   |__ethylene catabolic process
                                    |   |__propylene catabolic process
                                    |__alkyne catabolic process
                                    |   |__anaerobic acetylene catabolic process
                                    |__benzene catabolic process
                                    |__ethylbenzene catabolic process
                                    |   |__anaerobic ethylbenzene catabolic process
                                    |__fluorene catabolic process
                                    |__naphthalene catabolic process
                                    |__phenanthrene catabolic process
                                    |   |__phenanthrene catabolic process via trans-9(R),10(R)-dihydrodiolphenanthrene
                                    |   |__phenanthrene catabolic process via trans-9(S),10(S)-dihydrodiolphenanthrene
                                    |__styrene catabolic process
                                    |__terpene catabolic process 1 rec.
                                    |   |__carotene catabolic process(+) 1 rec.
                                    |   |__ent-pimara-8(14),15-diene catabolic process
                                    |   |__isoprene catabolic process
                                    |   |__miltiradiene catabolic process
                                    |   |__monoterpene catabolic process(+)
                                    |   |__sesquiterpene catabolic process(+)
                                    |__toluene catabolic process
                                    |   |__anaerobic toluene catabolic process
                                    |__xylene catabolic process
                                        |__m-xylene catabolic process
                                        |__o-xylene catabolic process
                                        |__p-xylene catabolic process