The man accused of throwing a Molotov cocktail at the San Francisco home of OpenAI CEO Sam Altman pleaded not guilty Tuesday to charges of attempted murder and attempted arson. Daniel Alejandro Morena-Gama, wearing an orange jail uniform, did not speak as his attorney entered the pleas during his arraignment in state court. The 20-year-old also faces federal charges. Morena-Gama, of Spring, Texas , hurled the flammable bomb at Altman’s home last month, setting an exterior gate alight before fleeing on foot, authorities allege. Less than an hour later, he went to OpenAI’s headquarters about 3 miles (5 kilometers) away and threatened to burn down the building, they say. After an initial court appearance last month, his lawyer, Diamond Ward, said Morena-Gama was experiencing a mental health crisis and had been excessively charged. Ward, a San Francisco deputy public defender, said it was a “property crime, at best” and that prosecutors were trying to curry favor with Altman.…