LM985 - CAS 87626-56-0
Category: Inhibitor
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Molecular Formula:
Molecular Weight:
LM985, the diethylaminoester derivative of LM975, has anti-tumor activities.
2-(diethylamino)ethyl 2-(4-oxo-2-phenylchromen-8-yl)acetate; flavone acetic acid diethanolamine ester; LM 985; LM 985 hydrochloride; LM-985; LM985; NSC 293015; oxo-4-phenyl-2,4,H-1-benzopyran-8-yl 2-diethylaminoethyl acetate HCl
Store in a cool and dry place (or refer to the Certificate of Analysis).
Boiling Point:
533.0±50.0 ℃ at 760 Torr
1.178±0.06 g/cm3
Canonical SMILES:
1.Clinical and pharmacokinetic phase I trial with the diethylaminoester of flavone acetic acid (LM985, NSC 293015).
Dodion PF;Abrams J;Gérard B;Crespeigne N;Peeters B;Van Berchem C;Kenis Y Eur J Cancer Clin Oncol. 1987 Jun;23(6):837-42.
The diethylaminoester of flavone acetic acid (LM985) is a new anticancer agent with curative effects against slow growing murine tumors. Thirty-one adult patients with solid tumors received a total of 57 courses of LM985 given on days 1 and 8 every 4 weeks. The drug was given as a short infusion (1-2 hr) at doses ranging from 120 to 1900 mg/sq.m/day. The dose-limiting toxicity consisted of acute expressive aphasia; this neurotoxicity usually appeared at the end of the infusion and resolved spontaneously within a few minutes to 1 hr after the end of the infusion. In some patients, neurotoxicity was avoided by reducing the infusion rate. Neurotoxicity was observed in 5 out of 6 patients receiving 960 mg/sq.m over 1 hr and in 3 out of 3 patients receiving 1900 mg/sq.m over 2 hr. The drug did not induce any significant myelosuppression. Other side-effects were very mild and consisted mainly of occasional nausea and/or vomiting at all dose levels. One patient with breast cancer resistant to several hormonal and chemotherapy regimens had stable disease for 6 months. LM985 was detected in plasma in very small concentrations (0-2.5 micrograms/ml) but there was extensive formation of flavone acetic acid (peak concentration ranging between 8.
2.Factors involved in the anti-cancer activity of the investigational agents LM985 (flavone acetic acid ester) and LM975 (flavone acetic acid).
Bibby MC;Double JA;Phillips RM;Loadman PM Br J Cancer. 1987 Feb;55(2):159-63.
LM985 has been shown previously to hydrolyse to flavone acetic acid (LM975) in mouse plasma and to produce significant anti-tumour effects in transplantable mouse colon tumours (MAC). It has undergone Phase I clinical trials and dose limiting toxicity was acute reversible hypotension. Substantially higher doses of LM975 can be given clinically without dose limiting toxicity. We have investigated the activity of LM975 against a panel of MAC tumours and also the in vitro cytotoxicity of both LM985 and LM975 in two cell lines derived from MAC tumours. LM985 is considerably more cytotoxic than LM975 in vitro but increased length of exposure to LM975 results in improved activity. Single in vivo injection of LM975 showed no activity against the ascitic tumour MAC 15A, moderate activity against the s.c. poorly differentiated tumour MAC 13 and produced a significant growth delay in the well differentiated MAC 26. These latter responses were considerably enhanced by repeated injection 7 days later. Pharmacokinetic studies in mice following i.p. injection of LM985 demonstrated rapid degradation of LM985 to LM975 in the peritoneum. Length of exposure as well as drug concentration appear important factors in determining anti-tumour responses.
3.Pharmacokinetics and anti-tumour activity of LM985 in mice bearing transplantable adenocarcinomas of the colon.
Double JA;Bibby MC;Loadman PM Br J Cancer. 1986 Oct;54(4):595-600.
LM985 is one of a series of compounds based on the flavone ring structure and selected for clinical trial primarily for its activity in colon 38 as part of the NCI screen. We have investigated the anti-tumour activity against three differing transplantable adenocarcinomas of the mouse colon (MAC). Single i.p. injection at maximum tolerated dose showed no activity against the ascitic tumour MAC 15A, moderate activity against subcutaneous tumours MAC 13 and MAC 15A and produced a significant growth delay against MAC 26. These responses against s.c. tumours were considerably enhanced by repeated injection 7 days later when greater than 90% tumour inhibition was seen in MAC 13 and cures were achieved in MAC 26. Pharmacokinetic studies confirm the rapid degradation of LM985 to LM975, the possible active principle. Analysis of area under the curve for LM975 indicated a good relationship with administered doses of LM985 and tumour responses. The MAC system shows a good correlation with human large bowel cancer and these preliminary observations with LM985 would suggest that it or its metabolite LM975 may have a value in the management of large bowel cancer.
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CAS 87626-56-0 LM985

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