JChem Base License Key

The maximum number of substructure and similarity searches per minute allowed by JChem Base is calculated from the license key entered using JChemManager. If no license key has been specified, then the program is in demo mode that allows one search per minute. Without a license key sent by ChemAxon or one of its distributors, the program can only be used for evaluation.

Before applying for a license key, the maximum number of substructure and similarity searches per minute should be predicted.

The following table helps you to determine the optimal access level. Using the Poisson distribution, the maximum number of searches can be calculated from the average number of searches at a given probability level.

Example for using the table:

Assume that you would like to be 99% sure that the maximum number of searches will not be exceeded in a one minute period. If you expect that the average number of searches will be 10 per minute at peak time, then choose 17 for the access level.

Please send your selection to ChemAxon when you request price information or a new license key allowing more searches.

Average

Max. (p=90%)

Max. (p=99%)

Max. (p=99.9%)

1

1

3

4

2

3

5

7

3

4

7

9

4

6

8

10

5

7

10

12

6

8

11

14

7

9

13

15

8

11

14

17

9

12

16

19

10

13

17

20

11

14

18

22

12

16

20

23

13

17

21

24

14

18

22

26

15

19

24

27

16

20

25

29

17

21

26

30

18

23

28

31

19

24

29

33

20

25

30

34

21

26

31

35

22

27

33

37

23

28

34

38

24

29

35

39

25

31

36

41

26

32

38

42

27

33

39

43

28

34

40

45

29

35

41

46

30

36

42

47

31

37

44

49

32

38

45

50

33

39

46

51

34

41

47

52

35

42

48

54

36

43

50

55

37

44

51

56

38

45

52

57

39

46

53

59

40

47

54

60

41

48

56

61

42

49

57

62

43

51

58

64

44

52

59

65

45

53

60

66

46

54

61

67

47

55

63

69

48

56

64

70

49

57

65

71

50

58

66

72

51

59

67

73

52

60

68

75

53

61

70

76

54

63

71

77

55

64

72

78

56

65

73

79

57

66

74

81

58

67

75

82

59

68

77

83

60

69

78

84

61

70

79

86

62

71

80

87

63

72

81

88

64

73

82

89

65

74

83

90

66

76

85

91

67

77

86

93

68

78

87

94

69

79

88

95

70

80

89

96

71

81

90

97

72

82

91

99

73

83

93

100

74

84

94

101

75

85

95

102

76

86

96

103

77

87

97

104

78

88

98

106

79

89

99

107

80

91

101

108

81

92

102

109

82

93

103

110

83

94

104

112

84

95

105

113

85

96

106

114

86

97

107

115

87

98

108

116

88

99

110

117

89

100

111

119

90

101

112

120

91

102

113

121

92

103

114

122

93

104

115

123

94

106

116

124

95

107

117

125

96

108

119

127

97

109

120

128

98

110

121

129

99

111

122

130

100

112

123

131

101

113

124

132

102

114

125

134

103

115

126

135

104

116

127

136

105

117

129

137

106

118

130

138

107

119

131

139

108

120

132

140

109

121

133

142

110

123

134

143

111

124

135

144

112

125

136

145

113

126

137

146

114

127

139

147

115

128

140

149

116

129

141

150

117

130

142

151

118

131

143

152

119

132

144

153

120

133

145

154

121

134

146

155

122

135

147

157

123

136

149

158

124

137

150

159

125

138

151

160

126

139

152

161

127

141

153

162

128

142

154

163

129

143

155

164

130

144

156

166

131

145

157

167

132

146

158

168

133

147

160

169

134

148

161

170

135

149

162

171

136

150

163

172

137

151

164

174

138

152

165

175

139

153

166

176

140

154

167

177

141

155

168

178

142

156

169

179

143

157

171

180

144

158

172

181

145

160

173

183

146

161

174

184

147

162

175

185

148

163

176

186

149

164

177

187

150

165

178

188

151

166

179

189

152

167

180

190

153

168

181

192

154

169

183

193

155

170

184

194

156

171

185

195

157

172

186

196

158

173

187

197

159

174

188

198

160

175

189

199

161

176

190

201

162

177

191

202

163

178

192

203

164

180

194

204

165

181

195

205

166

182

196

206

167

183

197

207

168

184

198

208

169

185

199

210

170

186

200

211

171

187

201

212

172

188

202

213

173

189

203

214

174

190

204

215

175

191

205

216

176

192

207

217

177

193

208

219

178

194

209

220

179

195

210

221

180

196

211

222

181

197

212

223

182

198

213

224

183

199

214

225

184

200

215

226

185

202

216

227

186

203

217

229

187

204

219

230

188

205

220

231

189

206

221

232

190

207

222

233

191

208

223

234

192

209

224

235

193

210

225

236

194

211

226

237

195

212

227

239

196

213

228

240

197

214

229

241

198

215

230

242

199

216

232

243

200

217

233

244