Antibiotics GE 81112 factors A, B, B1, pharmaceutically acceptable salts and compositions, and use thereof
The invention relates to antibiotic substances of microbial origin, arbitrarily denominated antibiotic GE 811112 factor A, factor B1 and factor B, which are produced by fermentation of Streptomyces sp. DSMZ 14386, the pharmaceutically acceptable salts and composition thereof, and their use as an antibacterial agent having activity versus susceptible microbes.
1. Isolated antibiotic GE 81112 Factor B having the following characteristics:
A) Mass spectrum recorded from a 0.01 mg/ml solution in acetonitrile:water 50:50 giving a monoprotonated ion at 659 m/z on a Thermofinnigan LCQ deca instrument under the following electrospray conditions: Spray Voltage: 4.7 kv; Capillary temperature: 250° C.; Capillary Voltage: 9V; Infusion mode 5 μl/min.
B) Infrared spectrum ( FIG. 6 ) recorded in KBr with an IFS-48 Fourier Transform spectrophotometer showing the following main bands (cm −1 ):
3359; 2958; 2852; 2258; 2129; 1681; 1591; 1450; 1385; 1347; 1122; 1072; 1025; 998; 765
C) 1 H-NMR spectrum ( FIG. 7 ) recorded at 600 MHz at 25° C. in DMSO-d 6 and trifluoroacetic acid (drops) showing the following 1 H signals:
Chemical shift (ppm)
Multiplicity
1.52
br d
1.57-1.72
m
1.83
br d
1.90
m
2.63
dd
2.88
dd
2.92
m
3.13
br d
3.64
m
3.83
m
3.95
br d
4.35
br s
4.46
m
4.50
dd
4.60
m
5.05
d
6.46
br
6.48
s
6.93
s
7.40
br s
7.84
d
8.05
d
8.33
m
8.54
d
9.00
br d
11.72
br s
11.75
br s
—
—
D) 13 C-NMR spectrum ( FIG. 8 ) recorded at 150 MHz, at 25° C. in DMSO-d 6 and trifluoroacetic acid (drops) showing the following 13 C signals
13 C Chemical shift (ppm)
Multiplicity
15.9
t
27.36
t
28.40
t
35.47
t
42.87
t
50.1
d
51.20
d
56.78
d
59.73
d
64.09
d
65.14
d
66.90
d
67.77
t
110.3
d
117.85
d
122.5
s
128.4
s
139.66
s
146.7
s
156.7
s
167.4
s
170.5
s
171.3
s
171.38
s
E) Retention time 21.6 min, determined by using an analytical HPLC Shimadzu LC10-AS, equipped with an “Altima” RP18, 5 μm, 250×4.6 mm i.d column; isocratic elution performed at 1 ml/min. flow rate, with 40 mM ammonium formate buffer, brought to pH 4.5 by addition of formic acid; UV detection at 230 nm.
2. Isolated antibiotic GE 81112 factor B1 having the following characteristics:
A) Mass spectrum recorded from a 0.01 mg/ml solution in acetonitrile:water 50:50 giving a monoprotonated ion at 658 m/z ib a Termofinnigan LCQ deca instrument under the following electrospray conditions; Spray Voltage: 47 kv; Capillary Temperature: 250° C.; Capillary voltage: 9V; Infusion Mode: 5 1/min.
B) H-NMR spectrum ( FIG. 10 ) recorded at 600 MH at 25° C. in DMSO-d 6 showing the following 1 H signals:
Chemical shift (ppm)
Multiplicity
1.38
br d
1.56-1.64
m
1.76
m
2.70
m
2.82
br s
2.92
m
3.01-3.06
m
3.49
br m
3.57
br s
4.20
br dd
4.26
br
4.40
br m
4.46
m
5.05
d
5.60
br s
6.21
br
6.52
br
6.78
br s
7.13
br
7.80
br d
7.90
br d
8.44
br
C) 13 C-NMR spectrum ( FIG. 11 ) recorded at 150 Mhz, at 25° C. in DMSO-d 6 showing the following 13 C signals:
Chemical shift (ppm)
Multiplicity
17.95
t
27.97
t
29.8
t
36.54
t
43.75
t
45.65
d
50.52
d
51.9
d
57.75
d
61.0
d
64.03
d
66.7
d
66.88
d
111.07
d
118.97
d
122.47
s
127.88
s
148.08
s
159.18
s
169.44
s
171.53
s
171.81
s
173.08
s
—
—
D) Retention time 18.4 min, determined by using an analytical HPLC Shimadzu LC10-AS, equipped with an “Altima” RP18, 5 μm, 250×4.6 mm i.d column; isocratic elution performed at 1 ml/min. flow rate, with 40 mM ammonium formate buffer brought to pH 4.5 by addition of formic acid; UV detection at 230 nm.