Provided are an organic compound and an application thereof. The organic compound has a structure represented by Formula I. Through the design of a molecular structure, the organic compound has suitable HOMO and LUMO energy levels, high singlet energy level, good optoelectronic performance, a high glass transition temperature and good thermal stability, easily forms a good amorphous film, and is suitable for the machining and use of an OLED device. The organic compound, when used in the OLED device, may be used as a light-emitting layer material, an electron transport material or a hole blocking material and especially suitable for use as a host material of the light-emitting layer and can effectively improve the luminescence efficiency of the device, improve the device stability, extend lifetime, and reduce an operating voltage and energy consumption so that the OLED device has significantly improved performance such as luminescence efficiency, lifetime and energy consumption.

Disclosed herein are secondary amine compounds that inhibit tRNA synthetase. The compounds of the invention are useful in inhibiting tRNA synthetase in Gram-negative bacteria and are useful in killing Gram-negative bacteria. The secondary amine compounds of the invention are also useful in the treatment of tuberculosis.

Disclosed herein are secondary amine compounds that inhibit tRNA synthetase. The compounds of the invention are useful in inhibiting tRNA synthetase in Gram-negative bacteria and are useful in killing Gram-negative bacteria. The secondary amine compounds of the invention are also useful in the treatment of tuberculosis.

A composition formed of a mixture of two compounds having similar thermal evaporation properties that are pre-mixed into an evaporation source that can be used to co-evaporate the two compounds into an emission layer in OLEDs via vacuum thermal evaporation process is disclosed.

A composition formed of a mixture of two compounds having similar thermal evaporation properties that are pre-mixed into an evaporation source that can be used to co-evaporate the two compounds into an emission layer in OLEDs via vacuum thermal evaporation process is disclosed.

In one aspect, compounds of Formula AA, or a pharmaceutically acceptable salt thereof, are featured:

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or a pharmaceutically acceptable salt thereof, wherein the variables shown in Formula A can be as defined anywhere herein.

In one aspect, compounds of Formula AA, or a pharmaceutically acceptable salt thereof, are featured:

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or a pharmaceutically acceptable salt thereof, wherein the variables shown in Formula A can be as defined anywhere herein.

The present invention relates to a photochromic compound having a core fused ring structure represented by at least one of the following Formula (Ia) or Formula (IIa), (Ia) (IIa) Independently for each of Formula (Ia) and Formula (IIa): R.sup.1 is in each case independently selected from substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —SO.sub.2R.sup.5, or —C(O)—XR.sup.5, where, X is selected from a single bond, —N(R.sup.5)—, or —O—, and R.sup.5 in each case is independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl; and B and B′ are each independently selected from substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl. The present invention also relates to photochromic compositions and articles including such photochromic compounds.

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The present invention relates to a photochromic compound having a core fused ring structure represented by at least one of the following Formula (Ia) or Formula (IIa), (Ia) (IIa) Independently for each of Formula (Ia) and Formula (IIa): R.sup.1 is in each case independently selected from substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —SO.sub.2R.sup.5, or —C(O)—XR.sup.5, where, X is selected from a single bond, —N(R.sup.5)—, or —O—, and R.sup.5 in each case is independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl; and B and B′ are each independently selected from substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl. The present invention also relates to photochromic compositions and articles including such photochromic compounds.

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Methods, systems, and computer readable media may be operable to facilitate an anticipation of an execution of a process termination tool. An allocation stall counter may be queried at a certain frequency, and from the query of the allocation stall counter, a number of allocation stall counter increments occurring over a certain duration of time may be determined. If the number of allocation stall counter increments is greater than a threshold, a determination may be made that system memory is running low and that an execution of a process termination tool is imminent. In response to the determination that system memory is running low, a flag indicating that system memory is running low may be set, and one or more programs, in response to reading the flag, may free memory that is not necessary or required for execution.