Table 3 Multiple element count restriction for compounds < 2000 Da, based on the examination of the Beilstein database and the Dictionary of Natural Products

NOPS all > 1

N< 10, O < 20, P < 4, S < 3

C₁₅H₃₄N₉O₈PS, C₂₂H₄₄N₄O₁₄P₂S₂, C₂₄H₃₈N₇O₁₉P₃S

NOP all > 3

N < 11, O < 22, P < 6

C₂₀H₂₈N₁₀O₂₁P₄, C₁₀H₁₈N₅O₂₀P₅

OPS all > 1

O < 14, P < 3, S < 3

C₂₂H₄₄N₄O₁₄P₂S₂, C₁₆H₃₆N₄O₄P₂S₂

PSN all > 1

P < 3, S < 3, N < 4

C₂₂H₄₄N₄O₁₄P₂S₂, C₁₆H₃₆N₄O₄P₂S₂

NOS all > 6

N < 19 O < 14 S < 8

C₅₉H₆₄N₁₈O₁₄S₇