| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_551bbcaa42124831c0e98e68bf19f397
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f7b463a881c360b9d0189d5c53792d18 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2603-46 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C237-26 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C237-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B63-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-24 |
| filingDate |
1992-04-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3c0ad5a995c5f50a52a77be68688eb6b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_795f9c3549be0b1ba33ce8c12f0880da |
| publicationDate |
1995-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0634995-A1 |
| titleOfInvention |
PROCESS AND INTERMEDIATE PRODUCTS FOR THE CLEANING OF OXYTETRACYCLINE. |
| abstract |
Prepn. of pure oxytetacycline (OTC) comprises suspending OTC hydrochloride (or OTC dihydrate and an equimolar amt. of HCl in the form of concn. hydrochloric acid) in glucial acetic acid under stirring and continuing stirring for 5 hrs. The obtd. OTC hydrochloride acetate ppte. is fitlered off, washed with glacial acetic acid and acetone and dried to constant wt. under reduced pressure at up to 40 deg.C. OTC hydrochloride acetate of formula (I) is a new cpd. |
| priorityDate |
1992-04-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |