To link to the content of EndoNet use the EndoNet ID that is given on the detail pages in the format ENX0000, where X is a place holder for the type of the component (e. g. R for receptor or C for anatomical structure). As URL for the linking append this ID to the detail page for this type of component. For an hormone that would be:
http://endonet.bioinf.med.uni-goettingen.de/hormone/ENH00000
It is also possible to use the search of EndoNet to link to the right detail page. The URL should look like
http://endonet.bioinf.med.uni-goettingen.de/search/ENC00000
ADQRRDFID IESKFALRT PEDTAEDTC HLIPGVAES VATCHFNHS SKTFMVIHG WTVTGMYES WVPKLVAAL YKREPDSNV IVVDWLSRA QEHYPVSAG YTKLVGQDV ARFINWMEE EFNYPLDNV HLLGYSLGA HAAGIAGSL TNKKVNRIT GLDPAGPNF EYAEAPSRL SPDDADFVD VLHTFTRGS PGRSIGIQK PVGHVDIYP NGGTFQPGC NIGEAIRVI AERGLGDVD QLVKCSHER SIHLFIDSL LNEENPSKA YRCSSKEAF EKGLCLSCR KNRCNNLGY EINKVRAKR SSKMYLKTR SQMPYKVFH YQVKIHFSG TESETHTNQ AFEISLYGT VAESENIPF TLPEVSTNK TYSFLIYTE VDIGELLML KLKWKSDSY FSWSDWWSS PGFAIQKIR VKAGETQKK VIFCSREKV SHLQKGKAP AVFVKCHDK SLNKKSG