Patents by Inventor Akiko Fujiwara

Akiko Fujiwara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Antibiotic SM-173B
    Patent number: 4206129
    Abstract: A novel antibiotic having the ascribed formula ##STR1## is provided. The physical characteristics are as follows: (a) Elementary analysis: Calculated (for C.sub.20 H.sub.16 O.sub.7): C, 65.22; H, 4.35%. Found: C, 64.60; H, 4.34%.(b) Molecular weight (mass-spectrometric): 368.(c) Melting point: 225.degree.-226.degree. C.(d) Specific rotation: [.alpha.].sub.D.sup.20 =+123.5.degree. (c=0.2 in chloroform).(e) Ultraviolet absorption spectrum:.lambda..sub.max.sup.methanol =235 nm (.epsilon.=28600); 262 nm (.epsilon.=21900); 434-435 nm (.epsilon.=11300);.lambda..sub.max.sup.0.1-N NaOH/methanol =246 nm (.epsilon.=22400); 256 nm (.epsilon.=23200); 523-524 nm (.epsilon.=9600).(f) Infrared absorption spectrum: 3500, 1710, 1672, 1628, 1600, 1575, 1472, 1452, 1420, 1390, 1295, 1255, 1218, 1200, 1182, 1105, 1025, 1005, 962, 938, 848, 765, 752, 730 cm.sup.-1.
    Type: Grant
    Filed: February 3, 1978
    Date of Patent: June 3, 1980
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Akiko Fujiwara, Mitsuhiko Fujiwara, Tatsuo Hoshino, Yuzuru Sekine, Masaaki Tazoe